Start with the vehicle's age, mileage, and condition

The price of a used car depends on three things you can observe yourself: how old it is, how many miles are on it, and what shape it's in. A 2019 Honda Civic with 60,000 miles and no rust will cost more than a 2016 Honda Civic with 120,000 miles and a dent in the door. The relationship is not linear — a car loses value fastest in its first three years, then more slowly after that. A five-year-old car is not worth half what a two-year-old car costs; the drop is steeper early and flattens out.

Mileage matters because it signals wear on the engine, transmission, and suspension. Most cars are expected to accumulate 12,000 to 15,000 miles per year. A car with 30,000 miles at three years old is below average and typically worth more than one with 60,000 miles at the same age. Condition includes visible damage, rust, interior wear, and whether the car has been in an accident. A car with a clean title (no accident history on record) is worth more than one with a salvage or rebuilt title, sometimes significantly more.

Key Takeaways

  • Kelley Blue Book and NADA Guides are the two main pricing tools dealers and private sellers use; both let you enter the year, make, model, mileage, and condition to get a price range.
  • The same car can have different values depending on where you are — a truck is worth more in rural areas, a sedan more in cities — so use your local market, not national averages.
  • Condition ratings (excellent, good, fair, poor) have specific meanings: excellent means no accidents and minimal wear; poor means major mechanical issues or heavy damage.
  • A pre-purchase inspection by a mechanic you choose costs $100 to $200 and can reveal hidden problems that lower the price by hundreds or thousands of dollars.

Use Kelley Blue Book and NADA Guides for baseline prices

Kelley Blue Book (kbb.com) and NADA Guides (nadaguides.com) are the two pricing sources that dealers, banks, and insurance companies rely on. Both work the same way: you enter the year, make, model, trim level, mileage, and condition, and they return a price range. Kelley Blue Book shows a "fair purchase price" range for your area; NADA shows wholesale (what a dealer pays at auction) and retail (what you pay at a dealership) separately. For a private sale, the price typically falls between those two numbers.

The condition rating you choose matters more than you might think. "Excellent" means no accidents, no rust, and minimal interior wear. "Good" means minor wear but no major damage. "Fair" means visible wear, possibly a minor accident, or some mechanical issues. "Poor" means significant damage or major mechanical problems. Moving from "good" to "fair" can drop the price by 10 to 20 percent. Both tools let you adjust for options (leather seats, all-wheel drive, navigation) and regional demand, so use your actual location, not a national average.

Check local market listings to see what similar cars actually sell for

Pricing tools give you a baseline, but the real market is what people in your area are actually asking and paying. Search for the same year, make, and model on Autotrader, Cars.com, Facebook Marketplace, and Craigslist. Look at cars with similar mileage and condition to the one you're considering. Note the asking prices, but remember that asking price is not the same as selling price — many sellers list high and negotiate down.

Pay attention to how long cars stay listed. A car that's been for sale for three weeks at $12,000 may indicate the seller is asking too much; the same car listed at $10,500 that sells in two days suggests the market price is closer to $10,500. If you see the same car listed multiple times over several months at different prices, the seller has been dropping it — a sign the initial price was inflated. Regional differences matter: a pickup truck is worth more in rural areas where trucks are common; a sedan is worth more in cities where parking is tight and fuel economy matters.

Account for accident history and title status

A car's title tells you whether it has been in a major accident. A clean title means no accident on record. A salvage title means the car was declared a total loss by an insurance company and then repaired. A rebuilt title means a salvage-titled car passed inspection and is now road-legal again. A car with a salvage or rebuilt title is typically worth 20 to 40 percent less than the same car with a clean title, even if the repair was done well.

You can check title status through Carfax or AutoCheck, which pull records from insurance companies and state DMVs. These reports also show the number of previous owners, service records, and whether the car was ever reported as stolen or flooded. A flood-damaged car can have hidden electrical and mechanical problems that show up months later, so a flood history is a major red flag. A car with multiple owners in a short time may indicate mechanical problems that drove each owner to sell.

Get a pre-purchase inspection to uncover hidden problems

The price estimates from Kelley Blue Book and local listings assume the car is in the condition you've described. A pre-purchase inspection by a mechanic you choose (not the seller's mechanic) costs $100 to $200 and can reveal problems that lower the car's value significantly. A mechanic will check the engine, transmission, brakes, suspension, and electrical system, and will tell you what repairs are needed soon and what can wait.

If the inspection finds a transmission problem, a failing water pump, or worn brake pads that need replacement soon, you can use that information to negotiate the price down. A $1,500 transmission repair justifies asking for a $1,500 price reduction. Many sellers will not allow an inspection, which is a warning sign — a car in good condition has nothing to hide. If a seller refuses, walk away or factor in the cost of repairs you cannot verify.

Adjust the price for mileage and regional demand

The pricing tools calculate a base price, but you may need to adjust it based on whether the car is above or below average mileage for its age. A car with 40,000 miles at three years old is below average and might be worth 5 to 10 percent more than the base estimate. A car with 80,000 miles at the same age is above average and might be worth 5 to 10 percent less. The adjustment depends on the make and model — luxury cars and sports cars lose value faster with high mileage than practical sedans do.

Regional demand also shifts prices. A four-wheel-drive SUV is worth more in Colorado or Minnesota than in Florida. A convertible is worth more in California than in Maine. A fuel-efficient hybrid is worth more in cities with high gas prices and limited parking than in rural areas where gas is cheap and parking is free. The pricing tools account for this if you enter your location, but if you're buying across state lines, research the market in the seller's area as well as your own.

Understand the difference between asking price and fair market value

The price a seller is asking is not the price the car is worth. Asking price is an opening position in a negotiation. Fair market value is what a willing buyer and a willing seller agree on when neither is under pressure. Pricing tools estimate fair market value based on recent sales data. If a car is listed at $15,000 but Kelley Blue Book says it's worth $13,000, the seller is asking above market — you have room to negotiate, or you can walk away and find a similar car at a lower price.

Conversely, if a car is listed at $11,000 and Kelley Blue Book says it's worth $13,000, the seller is asking below market. That's unusual and warrants investigation — the car may have hidden problems, the seller may be desperate to sell quickly, or the listing may be a scam. A price that seems too good to be true usually is. Use the pricing tools and local listings as your anchor; if a car is priced far outside the range, find out why before you commit.

Frequently Asked Questions

Does mileage matter more than age?

Both matter, but mileage is usually the stronger factor. A five-year-old car with 40,000 miles is typically worth more than a five-year-old car with 100,000 miles, even though they're the same age. However, a very old car (15+ years) loses value based on age alone, regardless of mileage, because parts wear out and technology becomes outdated.

How much does an accident lower the price?

A minor accident with a clean repair can lower the price by 5 to 15 percent. A major accident, even if repaired, can lower it by 20 to 40 percent. A salvage or rebuilt title lowers it by 20 to 40 percent regardless of repair quality. The exact amount depends on the make, model, and local market.

Should I trust Carfax or AutoCheck more?

Both pull from the same sources (insurance companies and state DMVs), so they're usually similar. Neither is complete — not all accidents are reported to insurance, and not all repairs show up in records. Use both if you can, and treat them as one data point, not the final word.

What if the seller won't let me get an inspection?

That's a red flag. A seller who refuses an inspection is either hiding a problem or being unreasonably difficult. You can walk away, or you can factor in the cost of potential repairs and lower your offer accordingly. Many private sellers will allow an inspection if you ask politely and offer to pay for it.

Can I use these prices to sell my own car?

Yes. Kelley Blue Book and NADA show what your car is worth in the current market. List it at or slightly above the "good" condition price if it's in good shape, and be prepared to negotiate down. Check local listings to see what similar cars are selling for, and price competitively or you'll sit on the market.