Black Book Trade in Calculator

Black Book Trade-In Calculator – Estimate Your Vehicle's Value body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; background-color: #f8f9fa; margin: 0; padding: 0; } .container { max-width: 960px; margin: 20px auto; padding: 20px; background-color: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } h1, h2, h3 { color: #004a99; text-align: center; margin-bottom: 20px; } .calculator-wrapper { background-color: #ffffff; padding: 30px; border-radius: 8px; box-shadow: 0 1px 5px rgba(0,0,0,0.05); margin-bottom: 30px; } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: #555; } .input-group input[type="number"], .input-group select { width: calc(100% – 22px); padding: 10px; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; box-sizing: border-box; } .input-group input[type="number"]:focus, .input-group select:focus { border-color: #004a99; outline: none; box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; } .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; justify-content: space-between; margin-top: 30px; gap: 10px; } button { padding: 12px 20px; border: none; border-radius: 5px; cursor: pointer; font-size: 1rem; font-weight: bold; transition: background-color 0.3s ease; } .btn-primary { background-color: #004a99; color: white; } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } .btn-reset { background-color: #ffc107; color: #212529; } .btn-reset:hover { background-color: #e0a800; } #results { margin-top: 30px; padding: 25px; background-color: #e9ecef; border-radius: 8px; text-align: center; } #results h3 { margin-top: 0; color: #004a99; } .result-item { margin-bottom: 15px; } .result-label { font-weight: bold; color: #555; display: block; margin-bottom: 5px; } .result-value { font-size: 1.8em; font-weight: bold; color: #28a745; } .result-value.primary { font-size: 2.2em; color: #004a99; background-color: #fff3cd; padding: 10px 15px; border-radius: 5px; display: inline-block; } .formula-explanation { font-size: 0.9em; color: #6c757d; margin-top: 15px; border-top: 1px solid #ccc; padding-top: 15px; } table { width: 100%; border-collapse: collapse; margin-top: 20px; margin-bottom: 30px; } th, td { padding: 10px; text-align: left; border: 1px solid #ddd; } th { background-color: #004a99; color: white; font-weight: bold; } tr:nth-child(even) { background-color: #f2f2f2; } caption { font-size: 1.1em; font-weight: bold; color: #004a99; margin-bottom: 10px; caption-side: top; text-align: left; } #chartContainer { width: 100%; max-width: 700px; margin: 20px auto; text-align: center; } #chartContainer canvas { border: 1px solid #ddd; border-radius: 5px; } .chart-caption { font-size: 0.9em; color: #6c757d; margin-top: 10px; } .article-section { margin-top: 40px; padding-top: 20px; border-top: 1px solid #eee; } .article-section h2 { text-align: left; margin-bottom: 15px; } .article-section h3 { text-align: left; margin-top: 25px; margin-bottom: 10px; color: #0056b3; } .article-section p { margin-bottom: 15px; } .faq-item { margin-bottom: 15px; } .faq-item strong { color: #004a99; display: block; margin-bottom: 5px; } .internal-links ul { list-style: none; padding: 0; } .internal-links li { margin-bottom: 10px; } .internal-links a { color: #004a99; text-decoration: none; font-weight: bold; } .internal-links a:hover { text-decoration: underline; } .internal-links span { font-size: 0.9em; color: #6c757d; display: block; margin-top: 3px; } .highlight { background-color: #fff3cd; padding: 2px 5px; border-radius: 3px; } .text-center { text-align: center; } .text-primary { color: #004a99; } .text-success { color: #28a745; } .mb-15 { margin-bottom: 15px; } .mt-20 { margin-top: 20px; } .pb-20 { padding-bottom: 20px; } .pt-20 { padding-top: 20px; }

Black Book Trade-In Calculator

Estimate your vehicle's wholesale and retail value for trade-in purposes.

Vehicle Trade-In Value Estimator

Enter the manufacturing year of your vehicle.
Enter the brand of your vehicle.
Enter the specific model of your vehicle.
Enter the total miles driven.
Excellent Good Fair Poor
Select the overall condition of your vehicle.
Add value for desirable aftermarket or factory options.

Estimated Trade-In Values

Wholesale Value (Auction Value) $0
Retail Value (Dealership Value) $0
Adjusted Retail Value $0
Estimated Trade-In Offer $0
Formula Explanation:

The Black Book value is a benchmark for a vehicle's wholesale (auction) and retail (dealership) price. Wholesale value is what a dealer might pay at auction. Retail value is what a dealer might sell it for. The Adjusted Retail Value accounts for optional features and necessary repairs. The Estimated Trade-In Offer is typically a percentage of the Adjusted Retail Value, reflecting the dealer's profit margin and reconditioning costs. This calculator uses simplified industry approximations.

Comparison of Estimated Vehicle Values
Key Value Components
Component Value ($) Description
Base Wholesale Value 0 Estimated auction price before adjustments.
Base Retail Value 0 Estimated dealership sale price before adjustments.
Mileage Adjustment 0 Factor based on above/below average mileage.
Condition Adjustment 0 Factor based on vehicle's condition.
Optional Features Added 0 Value of added equipment.
Repair Costs Deducted 0 Cost of necessary reconditioning.

What is a Black Book Trade-In Value?

The term "Black Book" in the automotive industry refers to a specific type of vehicle valuation guide, often considered a benchmark for wholesale and retail pricing. Unlike consumer-facing guides like Kelley Blue Book (KBB) or NADA Guides, the Black Book is primarily used by dealerships, auctions, and financial institutions. It provides estimated wholesale values (what dealers pay at auction) and retail values (what dealers sell for on the lot). A black book trade-in calculator leverages these industry standards to help vehicle owners estimate the potential value of their car when trading it in at a dealership.

Understanding your vehicle's Black Book value is crucial for negotiating a fair trade-in price. It provides a data-driven baseline, helping you gauge whether a dealer's offer is reasonable. This calculator aims to simplify that process, offering an estimate based on key vehicle attributes.

Who Should Use a Black Book Trade-In Calculator?

Anyone looking to trade in their current vehicle towards the purchase of a new or used car should consider using a black book trade-in calculator. This includes:

  • Individuals negotiating a new car purchase.
  • Dealerships assessing inventory and setting pricing.
  • Private sellers wanting to understand their car's market value.
  • Financial institutions determining loan collateral values.

Common Misconceptions about Black Book Values

A common misconception is that the Black Book value is the absolute final price a dealer will offer. In reality, it's a guide. Actual trade-in offers depend on many factors, including the dealer's specific market demand, the vehicle's condition, reconditioning costs, and the dealer's profit strategy. Another misconception is that all "book values" are the same; different guides (Black Book, KBB, NADA) may provide slightly different figures. The black book trade-in calculator provides one perspective, and it's wise to consult multiple sources.

Black Book Trade-In Value Formula and Mathematical Explanation

While the exact proprietary algorithms used by Black Book are confidential, a functional black book trade-in calculator simulates the process by adjusting a base value based on several key factors. The core idea is to start with a benchmark wholesale and retail price and then modify it.

The Simplified Formula

The calculation can be broadly represented as:

Adjusted Retail Value = (Base Retail Value + Optional Features Value) – Repair Costs

Estimated Trade-In Offer = Adjusted Retail Value * Dealer Offer Percentage

The Base Wholesale and Base Retail values are derived from industry databases, factoring in make, model, year, and trim. Adjustments are then applied.

Variable Explanations

Let's break down the variables used in our calculator:

Variables Used in Calculation
Variable Meaning Unit Typical Range / Input
Vehicle Year Manufacturing year of the vehicle. Year e.g., 1990-2024
Vehicle Make Brand of the vehicle (e.g., Ford, Honda). Text e.g., Toyota, BMW
Vehicle Model Specific model name (e.g., F-150, Civic). Text e.g., Accord, Silverado
Mileage Total distance driven by the vehicle. Miles Non-negative number
Condition Overall physical and mechanical state. Category Excellent, Good, Fair, Poor
Optional Features Value Monetary value of added desirable features. USD ($) Non-negative number
Repair Costs Estimated cost to fix identified issues. USD ($) Non-negative number
Base Wholesale Value Estimated auction price. USD ($) Calculated
Base Retail Value Estimated dealership sale price. USD ($) Calculated
Adjusted Retail Value Retail value after adjustments for options/repairs. USD ($) Calculated
Trade-In Offer Percentage Dealer's typical markup/discount factor. Percentage (%) Approx. 70-90% of Adjusted Retail
Estimated Trade-In Offer Final estimated offer from a dealer. USD ($) Calculated

Our calculator uses simplified logic for Base Values and Adjustments. For instance, higher mileage and poorer condition typically decrease the base values, while optional features increase the adjusted retail value. Repair costs directly reduce the adjusted retail value. The final offer is a percentage of this adjusted value, reflecting the dealer's need for profit.

Practical Examples (Real-World Use Cases)

Let's illustrate how the black book trade-in calculator works with practical scenarios.

Example 1: Well-Maintained Family Sedan

Scenario: Sarah wants to trade in her 2020 Toyota Camry LE with 45,000 miles. It's in excellent condition, has a premium sound system ($1,000 value), and needs new tires ($800 cost).

Inputs:

  • Vehicle Year: 2020
  • Vehicle Make: Toyota
  • Vehicle Model: Camry
  • Mileage: 45000
  • Condition: Excellent
  • Optional Features Value: $1000
  • Repair Costs: $800

Calculator Outputs (Illustrative):

  • Base Wholesale Value: $18,000
  • Base Retail Value: $21,000
  • Adjusted Retail Value: ($21,000 + $1,000) – $800 = $21,200
  • Estimated Trade-In Offer (assuming 85% of Adjusted Retail): $21,200 * 0.85 = $18,020

Financial Interpretation: Sarah can expect a trade-in offer around $18,020. The excellent condition and added features support a strong value, while the tire cost slightly reduces the final offer. This gives her a solid negotiation point.

Example 2: High-Mileage Work Truck

Scenario: John is trading in his 2018 Ford F-150 XLT with 120,000 miles. The truck runs well but has some cosmetic wear (fair condition) and needs minor bodywork ($1,500 cost). It has no significant added options.

Inputs:

  • Vehicle Year: 2018
  • Vehicle Make: Ford
  • Vehicle Model: F-150
  • Mileage: 120000
  • Condition: Fair
  • Optional Features Value: $0
  • Repair Costs: $1500

Calculator Outputs (Illustrative):

  • Base Wholesale Value: $15,500
  • Base Retail Value: $19,000
  • Adjusted Retail Value: ($19,000 + $0) – $1500 = $17,500
  • Estimated Trade-In Offer (assuming 75% of Adjusted Retail): $17,500 * 0.75 = $13,125

Financial Interpretation: John's offer is estimated around $13,125. The high mileage and fair condition significantly reduce the base values, and the needed repairs further lower the potential offer. He should be prepared for a lower offer compared to a newer, lower-mileage vehicle. This highlights the importance of vehicle maintenance for maximizing black book trade-in calculator results.

How to Use This Black Book Trade-In Calculator

Using our black book trade-in calculator is straightforward. Follow these steps to get an accurate estimate:

  1. Enter Vehicle Details: Accurately input the Year, Make, and Model of your vehicle.
  2. Input Mileage: Provide the total mileage. Higher mileage generally reduces value.
  3. Assess Condition: Select the condition that best describes your vehicle (Excellent, Good, Fair, Poor). Be honest; dealers will inspect it.
  4. Add Optional Features: If your vehicle has desirable upgrades (e.g., premium audio, sunroof, advanced tech packages), enter their estimated value.
  5. Estimate Repair Costs: Deduct the estimated cost of any necessary repairs (e.g., bodywork, mechanical issues, worn tires).
  6. Calculate: Click the "Calculate Value" button.

How to Read the Results

The calculator provides several key figures:

  • Wholesale Value: The estimated price a dealer might pay for your car at auction. This is typically lower than what you'll be offered privately.
  • Retail Value: The estimated price a dealer would sell a similar vehicle for on their lot.
  • Adjusted Retail Value: The retail value adjusted for your specific vehicle's options and needed repairs.
  • Estimated Trade-In Offer: This is the most relevant figure for your negotiation. It represents a likely offer from a dealership, factoring in their profit margin and reconditioning costs. It's usually a percentage of the Adjusted Retail Value.

Decision-Making Guidance

Use the black book trade-in calculator results as a starting point for negotiation. If the dealer's offer is significantly lower than the estimated trade-in offer, inquire about their valuation. Understand that dealers need to make a profit, so their offer will likely be less than the retail value. Consider the convenience of a trade-in versus selling privately, which often yields a higher price but requires more effort. This tool empowers you with knowledge to negotiate effectively.

Key Factors That Affect Black Book Trade-In Results

Several elements influence the value estimated by a black book trade-in calculator and, ultimately, the offer you receive. Understanding these factors helps in both preparation and negotiation.

  • Vehicle Condition: This is paramount. Excellent mechanical and cosmetic condition commands higher values. Dents, scratches, interior wear, and mechanical problems significantly reduce the estimated value.
  • Mileage: Lower mileage generally indicates less wear and tear, leading to higher values. High mileage vehicles are typically valued lower due to increased risk of future repairs.
  • Vehicle History: A clean title and a history free of major accidents, flood damage, or frame issues are crucial. A vehicle history report (like CarFax or AutoCheck) plays a significant role.
  • Trim Level and Options: Higher trim levels (e.g., EX-L vs. LX for a Honda) and desirable factory or aftermarket options (sunroof, navigation, premium audio, advanced safety features) increase a vehicle's value.
  • Market Demand: The popularity of a specific make, model, and year in your local area heavily influences its trade-in value. Fuel-efficient cars might be more valuable in areas with high gas prices, while trucks and SUVs are often in high demand elsewhere.
  • Reconditioning Costs: Dealers must factor in the cost of repairs, detailing, and any necessary maintenance before they can resell the vehicle. Higher estimated repair costs directly reduce the trade-in offer.
  • Time of Year: Seasonal demand can play a role. For example, convertibles might fetch higher prices in spring and summer, while 4WD vehicles might be more desirable before winter.
  • Dealer's Profit Margin: Ultimately, a dealer needs to profit from the sale. They will offer you a price that allows them to recondition the vehicle and sell it for more than they paid, considering overheads and market conditions.

Frequently Asked Questions (FAQ)

Q1: Is the Black Book value the same as the Kelley Blue Book (KBB) value?

No. While both are industry guides, they use different methodologies and data sources. Black Book is generally considered more focused on wholesale and auction values, often used by industry professionals. KBB provides values for consumers, including retail and private party sales. It's wise to check multiple sources.

Q2: Can I get the exact Black Book value offered by a dealer?

Rarely. The Black Book value is a benchmark. Dealers typically offer less than the retail value to account for reconditioning costs, overhead, and profit. Our black book trade-in calculator provides an *estimated* offer based on industry averages.

Q3: How accurate is this calculator?

This calculator provides a strong estimate based on common industry factors and simplified algorithms. Actual offers can vary based on the dealer's specific assessment, local market conditions, and negotiation.

Q4: What if my vehicle has significant damage?

If your vehicle has major damage (e.g., accident repair, severe mechanical failure), the estimated repair costs should be accurately reflected. In some cases, the repair cost might exceed the vehicle's adjusted value, making the trade-in offer very low or even negligible.

Q5: Does the calculator account for regional differences in value?

Our simplified calculator uses national averages. Regional demand can significantly impact actual values. For a more precise estimate, consider consulting local dealership guides or market analyses.

Q6: What's the difference between wholesale and retail value?

Wholesale value is the price a dealer pays at auction or from a trade-in, representing the lower end. Retail value is the price a dealer sells the vehicle for to a consumer, including a markup for profit and reconditioning.

Q7: Should I repair my car before trading it in?

It depends. If the repair cost is low and significantly increases the trade-in value (e.g., fixing a dent, replacing worn tires), it might be worthwhile. However, if the repair cost is high relative to the potential value increase, it's often better to accept a lower trade-in offer and let the dealer handle the reconditioning.

Q8: How can I maximize my trade-in value?

Keep your vehicle clean, perform regular maintenance, address minor issues promptly, research its value using multiple sources (including this black book trade-in calculator), and be prepared to negotiate. Highlighting desirable features and a good maintenance history can help.

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Real Black Book values are complex. // We'll use a base value and adjust it. var baseWholesale = 15000; // Example base wholesale var baseRetail = 19000; // Example base retail // Adjustments based on year (older = less value) var yearAdjustment = (new Date().getFullYear() – year) * 300; baseWholesale -= yearAdjustment; baseRetail -= yearAdjustment; // Adjustments based on mileage (higher = less value) var mileageFactor = 1 – (Math.min(mileage, 150000) / 150000) * 0.4; // Max 40% reduction for mileage baseWholesale *= mileageFactor; baseRetail *= mileageFactor; // Adjustments based on condition var conditionMultiplier = 1.0; if (condition === 'good') { conditionMultiplier = 0.90; } else if (condition === 'fair') { conditionMultiplier = 0.75; } else if (condition === 'poor') { conditionMultiplier = 0.60; } baseWholesale *= conditionMultiplier; baseRetail *= conditionMultiplier; // Ensure values don't go below a minimum floor var minFloor = 1000; baseWholesale = Math.max(baseWholesale, minFloor); baseRetail = Math.max(baseRetail, minFloor); // — Calculate Final Values — var adjustedRetail = baseRetail + optionsValue – damageDeduction; adjustedRetail = Math.max(adjustedRetail, minFloor); // Ensure adjusted retail is not negative // Dealer Offer Percentage (typical range 70-90% of retail) var dealerOfferPercentage = 0.80; // Default if (condition === 'excellent') dealerOfferPercentage = 0.85; if (condition === 'good') dealerOfferPercentage = 0.80; if (condition === 'fair') dealerOfferPercentage = 0.75; if (condition === 'poor') dealerOfferPercentage = 0.70; // Higher mileage might also reduce this percentage slightly if (mileage > 100000) dealerOfferPercentage *= 0.95; var tradeInOffer = adjustedRetail * dealerOfferPercentage; tradeInOffer = Math.max(tradeInOffer, minFloor); // Ensure offer is not negative // — Display Results — document.getElementById('wholesaleValue').textContent = '$' + baseWholesale.toFixed(0); document.getElementById('retailValue').textContent = '$' + baseRetail.toFixed(0); document.getElementById('adjustedRetailValue').textContent = '$' + adjustedRetail.toFixed(0); document.getElementById('tradeInOffer').textContent = '$' + tradeInOffer.toFixed(0); // — Update Table — document.getElementById('tableBaseWholesale').textContent = baseWholesale.toFixed(0); document.getElementById('tableBaseRetail').textContent = baseRetail.toFixed(0); document.getElementById('tableMileageAdj').textContent = (baseWholesale * (1 – mileageFactor)).toFixed(0); // Show reduction amount document.getElementById('tableConditionAdj').textContent = (baseWholesale * (1 – conditionMultiplier)).toFixed(0); // Show reduction amount document.getElementById('tableOptionsAdded').textContent = optionsValue.toFixed(0); document.getElementById('tableRepairsDeducted').textContent = damageDeduction.toFixed(0); // — Update Chart — updateChart(baseWholesale, baseRetail, adjustedRetail, tradeInOffer); document.getElementById('results').style.display = 'block'; } function updateChart(wholesale, retail, adjustedRetail, tradeInOffer) { var ctx = document.getElementById('valueChart').getContext('2d'); // Destroy previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } chartInstance = new Chart(ctx, { type: 'bar', data: { labels: ['Wholesale', 'Retail', 'Adjusted Retail', 'Trade-In Offer'], datasets: [{ label: 'Estimated Value ($)', data: [wholesale, retail, adjustedRetail, tradeInOffer], backgroundColor: [ 'rgba(0, 74, 153, 0.6)', // Wholesale 'rgba(40, 167, 69, 0.6)', // Retail 'rgba(255, 193, 7, 0.6)', // Adjusted Retail 'rgba(108, 117, 125, 0.6)' // Trade-In Offer ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(40, 167, 69, 1)', 'rgba(255, 193, 7, 1)', 'rgba(108, 117, 125, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, ticks: { callback: function(value, index, values) { return '$' + value.toLocaleString(); } } } }, plugins: { legend: { display: false // Hide legend as labels are on bars }, title: { display: true, text: 'Vehicle Value Comparison' } } } }); } function copyResults() { var wholesale = document.getElementById('wholesaleValue').textContent; var retail = document.getElementById('retailValue').textContent; var adjustedRetail = document.getElementById('adjustedRetailValue').textContent; var tradeInOffer = document.getElementById('tradeInOffer').textContent; var year = document.getElementById('vehicleYear').value; var make = document.getElementById('vehicleMake').value; var model = document.getElementById('vehicleModel').value; var mileage = document.getElementById('mileage').value; var condition = document.getElementById('condition').value; var options = document.getElementById('optionsValue').value; var repairs = document.getElementById('damageDeduction').value; var copyText = "— Estimated Trade-In Values —\n\n" + "Vehicle: " + year + " " + make + " " + model + "\n" + "Mileage: " + mileage + "\n" + "Condition: " + condition + "\n" + "Optional Features Value: $" + options + "\n" + "Estimated Repair Costs: $" + repairs + "\n\n" + "Wholesale Value: " + wholesale + "\n" + "Retail Value: " + retail + "\n" + "Adjusted Retail Value: " + adjustedRetail + "\n" + "Estimated Trade-In Offer: " + tradeInOffer + "\n\n" + "— Key Assumptions —\n" + "Values are estimates based on industry data and simplified calculations. Actual offers may vary."; navigator.clipboard.writeText(copyText).then(function() { alert('Results copied to clipboard!'); }, function(err) { console.error('Could not copy text: ', err); // Fallback for older browsers or if clipboard API fails var textArea = document.createElement("textarea"); textArea.value = copyText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'successful' : 'unsuccessful'; alert('Results copied to clipboard! (' + msg + ')'); } catch (err) { alert('Could not copy text. Please copy manually.'); } document.body.removeChild(textArea); }); } function resetCalculator() { document.getElementById('vehicleYear').value = "; document.getElementById('vehicleMake').value = "; document.getElementById('vehicleModel').value = "; document.getElementById('mileage').value = "; document.getElementById('condition').value = 'good'; document.getElementById('optionsValue').value = '0'; document.getElementById('damageDeduction').value = '0'; // Clear errors document.getElementById('vehicleYearError').textContent = "; document.getElementById('vehicleYearError').style.display = 'none'; document.getElementById('vehicleMakeError').textContent = "; document.getElementById('vehicleMakeError').style.display = 'none'; document.getElementById('vehicleModelError').textContent = "; document.getElementById('vehicleModelError').style.display = 'none'; document.getElementById('mileageError').textContent = "; document.getElementById('mileageError').style.display = 'none'; document.getElementById('optionsValueError').textContent = "; document.getElementById('optionsValueError').style.display = 'none'; document.getElementById('damageDeductionError').textContent = "; document.getElementById('damageDeductionError').style.display = 'none'; // Reset results document.getElementById('wholesaleValue').textContent = '$0'; document.getElementById('retailValue').textContent = '$0'; document.getElementById('adjustedRetailValue').textContent = '$0'; document.getElementById('tradeInOffer').textContent = '$0'; // Reset table document.getElementById('tableBaseWholesale').textContent = '0'; document.getElementById('tableBaseRetail').textContent = '0'; document.getElementById('tableMileageAdj').textContent = '0'; document.getElementById('tableConditionAdj').textContent = '0'; document.getElementById('tableOptionsAdded').textContent = '0'; document.getElementById('tableRepairsDeducted').textContent = '0'; // Clear chart if (chartInstance) { chartInstance.destroy(); chartInstance = null; } var canvas = document.getElementById('valueChart'); var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); document.getElementById('results').style.display = 'none'; } // Initial calculation on load if default values are set, or just setup chart window.onload = function() { // Add a placeholder canvas element if it doesn't exist, or ensure it's correctly sized var canvas = document.getElementById('valueChart'); if (!canvas) { var chartContainer = document.getElementById('chartContainer'); canvas = document.createElement('canvas'); canvas.id = 'valueChart'; chartContainer.appendChild(canvas); } // Set a default size for the canvas if needed, or rely on CSS canvas.width = 700; // Example width canvas.height = 300; // Example height // Initialize chart with zero values updateChart(0, 0, 0, 0); document.getElementById('results').style.display = 'none'; // Hide results initially }; // Add event listeners for real-time updates (optional, but good UX) document.getElementById('vehicleYear').addEventListener('input', calculateTradeIn); document.getElementById('vehicleMake').addEventListener('input', calculateTradeIn); document.getElementById('vehicleModel').addEventListener('input', calculateTradeIn); document.getElementById('mileage').addEventListener('input', calculateTradeIn); document.getElementById('condition').addEventListener('change', calculateTradeIn); document.getElementById('optionsValue').addEventListener('input', calculateTradeIn); document.getElementById('damageDeduction').addEventListener('input', calculateTradeIn);

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