[header] How to become a car dealer in california [title] Decide if you need a license. [step] If you're just selling your own used car you don't need a license. However, if you're going to be buying and selling cars for the purpose of making a profit, you'll need a license from the dmv. 
Selling cars for profit without a license in ca is illegal. This activity is called " curbstoning " and can involved hefty fines if you're caught.