Let's look at from another angle. When was the last time you took your old car into the dealership and the dealer could see that you have lovingly cared for this vehicle that your about to send to the next caretaker for the rest of its existance, and he recognized that you've been such a wonderful car owner that he feels obligated to give you every nickle that your car would be worth on the retail market, and since your such a great person he's goning to discout the new car that your buying by at least 20%, just because your who you are.
I'm gonna puke.
Don't nock the guy for falling into a fabulous deal, taking a chance on the "sight unseen purchase", be willing to spend the time to get the critters, not to mention the time and the willingness to fix em up, and he still tries to sell them for nearly half of market value.
Bet your car dealer, on the other hand, tries to steal you trade in, poke you in the backside for an overpriced sticker, and tries to get you to "thank him" for treating you so wonderfully.
Everybody here who has a problem with this sale should read a couple of books about selling. You'd have a very different view of how it really works.