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