To approximate the price the dealer paid for a car at the auction, or when it was traded in you need to find the wholesale blue book for used cars. This is important because as I always stress some dealers are not willing to forgo a penny you are letting go, in other words, if a car is worth 5000, and you are willing to pay 10000 they will take it, and distribute between the salesperson and their bank account.
For what it’s worth, the appraisal books are there to benefit the dealers more than anything else. To prove this point, when the blue book first came out, only dealers had access to it, until they published a version that it used by the public Now remember, the dealership is in business to make money, which is a right they deserve. They took the risk of buying the car, invested to bring it to a new condition, but on the other hand, they should not make more than the average on your deal. Without further to say, lets introduce and briefly describe each of the terms you are to encounter in your journey to find the wholesale blue book for used cars.
Trade in, is the price you are supposed to let your car go at the dealership. Now aim for wholesale, because this is the price dealers pay at the auctions, and it tends to be higher than the trade in value. The last 2 are self explanatory, those are private party, and suggested retail price. Hence, never pay the book value at excellent condition, you should aim somewhere over good, but below excellent.