For what you might actually pay for that used car, use the Kelley Blue Book® Fair Market Range as a guide. It'll show you what you can reasonably expect to pay this week in your area for a used vehicle with the options and mileage you want. It's based on data from real transactions, plus market conditions and vast industry knowledge.

NADAGuides offers three different trade-in values for each used truck based on the its current condition — Rough Trade-In, Average Trade-In, and Clean Trade-In. Kelley Blue Book asks sellers to approximate the truck’s condition before offering a value. Mileage on the truck is also an issue.