East County Pre-Owned Superstore the used Dodge, and Nissan, Headquarters. Located in El Cajon, California here in San Diego! We've been San Diego County's Best for over 20 years and the #1 independent dealership in California 7 years running! We have over 500 vehicles available. The East County Pre-Owned Superstore can also find almost any used car, truck, sport utility, SUV's, luxury, hybrid, economy, or sports car you are looking for at an affordable price and can get you the absolute best rate in financing. Why pay more for certified preowned? Our vehicles are better than certified and for less money. We ship world-wide.