Well, I guess since you can't get your car back to stock, you'll just have to sell the car as is. It might be difficult but someone will buy it. I've got friends who buy used cars and slap rims on them, bottle feed them, and put in little things like gauges, shift knobs, pedals and an exhaust. Then they turn around and sell them. They make pretty good money off this and surprisingly there are alot of people who are interested in buying the cars they sell. There's even a car dealership here in So Cal that only sells used fixed up cars and people actually buy them. Although it pisses me off when I see people with those cars and start revving up!! It just makes me mad seeing someone try to race when they didn't even put in the time and effort into the car!! (That's another subject though)
Anyways, I think there is a possibility that you could sell the car, the only problem is the price. I suggest you put your car in autotrader.com. I'm sure you'll find somebody!
Good Luck!