Finding the right car under $500 down in National City, CA is just a few simple steps away. Each used vehicle in National City listed can be bought with $500 down. Buy a car with 500 dollars down in National City and get an auto loan with $500 down at a single convenient National City California location. Our San Diego area used car dealers offer you the best chance to finance a used car in National City with a low down payment and a monthly payment that fits within your budget.