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