I am looking to buy a used car here in California, a 2020 mazda 6. The car is advertised for 19500. I have 10,000 to put down. Should I put the full 10,000 down or should I only put down 20% then put the rest down after starting to finance the car to ensure the money goes to the principle? Is what I am saying making sense? lol. I purchased a new vehicle before and to this day I am still wondering what happened to the down payment I put down. Someone please help.