My experience tell me, the trade in price for a used car varies 10k from the asking price.

For Hot model like Camry, one can trade in instantly at 5k below market price. they can sell it in weeks. However, unpopular model like 407, it might have prb trading in. Used car dealers would not accept them or offer a ridiculous price like 15 to 20k below market value. It is hard to find buyers and the value depreciate > 10k a year. It is like 1k every month!