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