I've never traded in a car. Why would I just give away all that value? Unless your car has something majorly wrong with it, no way. Carmax is just as bad. They make a good 20 or 25% I'm sure. My father is a master at this. He'll bang on for hours until the guy breaks down. Funny, there's something about writing the number down. He does that too, it seems to have a lot more impact and works.