Resale value...?
My car is priceless-- it's not for sale.
Some owners have alot of cash invested in their rides. Since the "General" isn't making anymore TA's anytime soon, and the new Camaro isn't on the horizon yet, people feel justified in putting a premium on their rides. It's not like there is a newer, better, and more desirable model in showroom taking the shine off the previous models.
Supply and demand.

