advice on trading in a car and have the money left on my loan put onto my...

[xprincezzSicax]

...new car (upside down deal)? On December of 07 my parents were in search for a suv they really needed a car and no dealer could help them cause of their credit well there was only 1 dealer we found that supposedly approved any1 so they were able to get a 05 Ford Escape but they could only do it using me as co-signer. Now they have been having problems with this car and it wastes soo much gas we absolutely hate it and we had probs with it since the beginning with the seats being torn. Well they told us that we can go back in 6 months and if the payments have been made good that my parents credit would be a lil better and they can re-finance and get something else by themselves. 6 months is here and now i learned how to look up values of cars on KBB so we dont get screwed again but i need advice cuz i know that we wont get alot for the suv(13,998 and we still owe 13k) and we will have money left in the loan and it will be put on another car but i need advice on how to deal w/ dealers and explain them the situation