Whether you are planning to buy a used vehicle or are planning to sell one, having a good idea of what that vehicle is worth is critical to getting a good deal. The problem is, how do you go about determining the value of a particular used car, truck, SUV, or van? There is no 800-number hotline you can call with questions. And the mechanic who works in the independent shop on the corner is a great source of knowledge on many things automotive… but on price? Not so much. So where do you turn to get a good snapshot of the value of an individual used car? For close to a hundred years, many people have looked to the primary auto price guidebooks — Kelley Blue Book and NADA Guides — to help them figure out the value they want and need to have.