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