Still that word, for a $8700 value, you can get at most a 4 years Ford focus or GM car. Trade in value is not only a little bit less, but a lot less.
Dealer needs to pay for refine and detailing, necessary repair and safety and emission test cost. Dealer also need to pay sales person's salary, and keep the company running with some other expense. It's not possible to sell the car as a little bit more than the trade in value.