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