How do you sell cars in test drive unlimited

Simply go to one of your houses and click trade.
You will end up in a screen, where you can sell your car.
But remember: You can´t sell, unless you have a car,
which is in the same class.

Regards If you have got the PSP version: Got to the car dealer. Buy cars until there is no money left. Buy a low price car and exchange all cars you want to sell. You will get the money. Regards from XGoodOne