If you want to sell your car as profitably as possible, the best place to start is with decent photos. — dpa There are a few ways you can make the difficult business of selling your car yourself slightly easier – and ideally more profitable. 1. Clean up to cash in: You can charge more if your car is thoroughly cleaned and has had an overhaul. “Usually, that investment pays for itself, ” says Marcel Muehlich of the Auto Club Europa (ACE). You’ll also want to make sure you’re well informed about the current state of the car in terms of technology and that you have all the necessary papers, which may include vehicle registration, purchase paperwork and test certificates, says Johannes Boos of Germany’s ADAC, Europe’s biggest car club.