Ok, so I have a 1999 Ford Taurus that I bought from some swindler auto dealer. It is seriously a lemon! I NEED a dependable car for me and my daughter but I still owe $1300 to the guy. I valued the car and its worth about $500. I would qualify for the Aircheck Texas (Cash for Clunkers) if I didn't owe on the car. Can I still use this car as a downpayment during trade in or do I still need to come up with a down payment. I am not wanting an expensive car. No more than $9000. I am just confused about the car buying process. Thanks!