Unfortunately you won't be able to sell the car for very much money if it's not running, you're like the people that bought my 94 Cutlass and the engine locked up on them after 8 days of ownership, stuck between a rock and a hard place. The only thing you can do is fix it and sink more money into the car. If the car is clean and worthy of repair then you'll have to dig up the funds to do that. Otherwise the only other option is to attempt to find someone to buy the car as is, with the engine needing work, such as a salvage yard, then you're looking at getting a few hundred, and I mean a few, like two or three hundred max. One other option is to trade it to a dealer on another car, they may be willing to deal if sales are slow where you are, they can repair and sell easier than you, but be prepared, they will likely only give you a "few hundred" as well. Good Luck!