Diminished value is the reduction in a vehicle's market value after it has been damaged and repaired, even if repairs restore it to pre-accident condition. When your vehicle is involved in an accident, its resale value decreases because it now has an accident history. Insurance companies may owe you compensation for this lost value.
To successfully claim diminished value, you need evidence of your vehicle's pre-accident market value. This is where comparable sales data becomes essential—it shows what similar vehicles have actually sold for, providing objective proof for your claim.
Insurance companies require objective evidence when evaluating diminished value claims. Comparable sales data from real auctions provides this evidence by showing:
Without comparable sales data, appraisers must rely on estimates or general market averages, which often undervalue your claim. Real auction data strengthens your position with concrete evidence.
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Create Free AccountOld Cars Data provides the market evidence that appraisers need to support diminished value claims. We do not provide appraisals, legal advice, or insurance advice. Our role is to give you access to real auction data that licensed appraisers can use to calculate accurate diminished value.
When filing a diminished value claim, work with a licensed appraiser in your area. Share our comparable sales data with them to:
Our database covers over 250,000 auction sales from major platforms, giving appraisers comprehensive data to work with. Access the data through our API or Google Sheets add-on—whichever method works best for your appraiser.
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Sign Up FreeAccess comparable sales data for these popular models. Each page includes model-specific insights, recent auction sales, and market context to support your diminished value claim.
Create a free account to access comparable sales data. No credit card required.
Get Started FreeOld Cars Data provides market data only. This information is not legal advice, appraisal advice, or insurance advice. Always consult with licensed professionals (appraisers, attorneys, insurance experts) when filing a diminished value claim.
Our auction data is sourced from leading platforms including Bring a Trailer, Cars & Bids, and other major classic car auction sites. All data represents actual completed sales, not estimates or listings.
Reviewed by Old Cars Data market data team. Data is updated daily and verified against source platforms.
