Support your diminished value claim with completed auction comps from seven major platforms. Appraisers need evidence - Old Cars Data gives them normalized market records.
275,000 auction sales
Completed sales, not listing estimates
Updated daily
Yesterday's auction activity available today
Seven sources
BaT, Cars & Bids, Hagerty, PCAR, Gooding, and more
Definition
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. Once a vehicle carries an accident history, its resale value decreases, and insurers may owe you compensation for that lost value.
To claim diminished value, you need evidence of your vehicle's pre-accident market value. Comparable sales data shows what similar vehicles actually sold for, providing objective proof for your claim.
Evidence
We provide evidence, not appraisals
Old Cars Data provides the market evidence appraisers need to support diminished value claims. We do not provide appraisals, legal advice, or insurance advice. When filing a claim, work with a licensed appraiser and share our comparable sales data with them to:
Access the data
Coverage from 2018 to present, updated daily, across more than 275,000 auction sales.
Query auction data in plain English via MCP. No coding required. Perfect for appraisers and analysts.
Programmatic access to auction data. Perfect for developers and automated workflows.
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Diminished value data by model
Each model page includes recent auction sales and market context to support your claim.
"What did diminished value compss sell for last month?"- get answers in seconds. Ask about values, trends, comparisons, or anything you'd look up manually.
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Trust & transparency
Old Cars Data provides market data only. This is not legal, appraisal, or insurance advice. Always consult licensed professionals when filing a diminished value claim.
Sourced from Bring a Trailer, Cars & Bids, Hagerty, PCAR Market, All Collector Cars, Gooding & Co, and RM Sotheby's. All data represents actual completed sales, not estimates.
Reviewed by the Old Cars Data market data team. Data is updated daily and verified against source platforms.
Browse the archive
Search every tracked make and model to pull comparable auction sales for your make, model, and year.
Reference notes
Diminished value is the reduction in a vehicle's market value after it has been damaged and repaired, even when repairs restore it to pre-accident condition, because the vehicle now carries an accident history.