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