What's the difference between book value and market value for a used car?
A book value is a published estimate of a vehicle's value. On OAV, market value means the asking-price range of comparable vehicles in the market snapshot, not their final sale prices. OAV does not publish a book value; it compares a listing's asking price against current comparable listings.
Book value
Book values come from guides and pricing services and may describe trade-in, private-party or retail value. Check which type of transaction an estimate describes before comparing it with a dealer's asking price.
Current market value on OAV
OAV uses comparable vehicles for sale to evaluate a listing's asking price. The comparable range reflects asking prices in the market snapshot, not completed sales.
Why the figures can disagree
A published estimate and a range of asking prices do not necessarily measure the same thing. A trade-in estimate is not a dealer retail asking price, and even a retail estimate can differ from comparable asking prices in a particular snapshot.
A difference does not, by itself, show that either figure is wrong. OAV withholds a verdict when the comparable evidence is too thin or too scattered rather than substituting a book value.
How OAV approaches it
OAV compares a listing's asking price against current comparable listings and publishes a Price-to-Market verdict when the evidence supports one. Great Deal, Fair Price and Overpriced are price-comparison verdicts, not book values, appraisals or predictions of sale price.
When the evidence does not support a verdict, the vehicle page shows Unscored with a reason instead of a verdict and comparable range. The Price-to-Market methodology explains the verdict labels and when OAV withholds them.
Where an OAV new-car report shows a Market Retail Price, it is the midpoint of the comparable range, not a book value.
What the evidence can and cannot tell you
A supported comparison shows how an asking price sits against comparable listings in the market snapshot. It does not establish the vehicle's condition or history, its trade-in value, or the price a buyer and seller will agree on.
Where to look
Explore a market or collection, or use the VIN price check to look for a dealer-listed vehicle OAV holds. Open a vehicle page to see which price evidence is available.
- Market: Browse vehicles in California
- Vehicle collection: Browse a vehicle collection
- VIN lookup: Check a vehicle by VIN
- Vehicle example: See a vehicle-page example
- Methodology: Read the Price-to-Market methodology
- Related question: How do I find cars priced below market value?
Questions about book value and market value
Is a car priced under book value a good deal?
Not necessarily. A guide estimate and current comparable asking prices can differ. OAV's verdict compares the asking price with comparable vehicles for sale in the market snapshot, and it is published only when the evidence supports one.
Does OAV give a book value or trade-in value?
No. OAV evaluates asking prices against current comparable listings; it does not publish book, trade-in or appraisal values.
Copy reviewed: October 2, 2026. Market evidence dates are separate from this review date.