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How to Find Accurate Trade-In Comps When Appraising a Used Car

Accurate trade-in comps match the trade on the specs that move price: drivetrain, engine, fuel, transmission and body style. Not just year and mileage. The fix is filtering the comp set down to vehicles that really match.

Jason MayhewJune 29, 20266 min read

What makes a trade-in comp accurate?

A comp is accurate when it matches the trade on the specs that change what a buyer pays: drivetrain, engine, fuel type, transmission and body style. Year, make, model and mileage get you in the neighborhood. The specs get you to the right house. Skip them and you are averaging together vehicles that do not belong in the same set.

The gap is real money. A 4-cylinder front-drive comp can misprice a V6 all-wheel-drive trade by thousands. If your comp set blends both, your appraisal drifts toward the wrong configuration and you either overpay on the trade or lose it to a sharper store.

Why isn't year and mileage enough to value a used car?

Because two units with the same year, make, model and mileage can be very different cars. One is a base front-drive 4-cylinder. The other is a loaded all-wheel-drive V6. Comping on year and mileage alone treats them as interchangeable and pulls your number toward whichever variant happens to dominate the list.

That distortion is invisible until you lose a deal over it. The number looked defensible on a generic comp set. It was not, because the comps were not the same vehicle.

How does BKD match comps to the right specs?

BKD carries drivetrain, engine, fuel, transmission and body style onto every comparable and auto-matches them to the subject vehicle. On every appraisal surface you can filter the comp set by those specs, or show all and adjust by hand, and the worksheet valuation moves with the filtered set.

So when you appraise a trade, the comps in front of you are units that actually match it. The number you hand the customer is built on the right cars, and you can defend it on the desk without hand-waving.

Frequently asked questions

What makes a trade-in comp accurate?

An accurate trade-in comp matches the subject vehicle on the specs that move price: drivetrain, engine, fuel type, transmission and body style, not just year, make, model and mileage. A 4-cylinder front-drive comp will misprice a V6 all-wheel-drive trade by thousands, so the spec match is what makes the number defensible.

Why is year and mileage not enough to value a used car?

Two units of the same year, make, model and mileage can carry very different value depending on drivetrain, engine and trim-level equipment. Comping on year and mileage alone blends those variants together and pulls your number toward the wrong configuration. Filtering comps to the matching specs removes that distortion.

How does BKD match comps to the right vehicle specs?

BKD carries drivetrain, engine, fuel, transmission and body style onto each comparable and auto-matches them to the subject vehicle. You can filter the comp set by those specs on every appraisal surface, or show all and adjust, so the worksheet valuation reflects units that actually match the trade in front of you.

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