If i was to turn in cars, it'd be piece by piece. The whole car price is ridiculous. They take in affect the waste items such as the glass windows, tires, and upholstery. It makes me an extra few bucks taking things in piece by piece. Plus, the engine blocks 90% of the time are cast aluminum, so you get a few extra bucks for that too. Or re-sell some working car parts to even triple your profits.