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