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