Try Repokar.com. From my experiences it is one of the best Auto Auction which is online and public. They verifies their sellers and if you want to buy a car there you don't find junk cars. And also before buying a car they allow you to make the inspection, it makes us be sure that we buy a car in good condition.
Try Otay and Escondido. The Road One San Diego website provides all the information on the action dates for the vehicles that are available to the public. Visit http://www.roadonesandiego.com/ for a list of the vehicles that are available for action.