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