How do I know if a used car's price is fair for its year and mileage?
Use the free tool — Used Car Decoder
Why the asking price alone doesn't answer the question
A number on a listing doesn't tell you if it's fair. Two cars from the same year can be priced very differently depending on mileage, condition, and what the seller left out of the ad. Used Car Decoder reads the listing and the VIN you paste in and gives you a typical price band for that year and mileage — a starting point for comparison, not a final answer.
What a "typical price band" actually means
The price band the tool gives you is a typical market figure for that year and mileage. It is not an appraisal of the specific car in the listing. Actual value varies by region and condition, so treat the band as a starting point, not a final number.
Red flags in the listing that affect whether a price is fair
Phrases like "runs great," "minor cosmetic," "title in hand," or "serious buyers only" all mean something — and can hide problems that make an asking price too high. The tool flags these phrases in plain words and shows you what's missing from the ad, such as service history or accident information.
- What each red-flag phrase usually means
- What information is missing from the ad
- The typical price band for that year and mileage
What you still need to check yourself
Used Car Decoder reads the listing, not the car. It can't see the vehicle or verify its condition. Always get a pre-purchase inspection before paying.
- It cannot access title or accident history databases. For that, use a paid report like Carfax or AutoCheck, or the NMVTIS.
- Recall status must be checked directly at nhtsa.gov/recalls. The tool links you there but doesn't pull or confirm that data itself.
- The tool is not affiliated with any seller, dealer, marketplace, or manufacturer.
Questions to ask and what to bring
Along with the price band and red flags, the tool gives you the questions to text the seller first, and an inspection checklist to bring — or hand to a mechanic for a pre-purchase inspection.
What to do next
Paste your own listing and VIN into Used Car Decoder. The first decode is free. It will read your actual numbers and words — the year, the mileage, and the exact phrases in the ad — and hand back the red flags, the price band, and the checklist to bring before you drive across town.
Used Car Decoder is an informational tool. It cannot see the vehicle, verify the VIN, or access title or accident databases; recall status must be checked at nhtsa.gov/recalls and history through a paid report (Carfax/AutoCheck) or the NMVTIS. Price bands are typical figures and vary by region and condition. It is not affiliated with any seller, dealer, marketplace, or manufacturer.