Need help on making a decision.?

[i am me]

(Back story so you can hopefully give the best answer) I bought a car and was defrauded (had plenty of solid evidence for it) but unable to sue them in the county courts due to them hiding behind a arbitration clause they put in the buyers order contract. Now I had the option of going threw the arbitration courts sure but they are too expensive.

So basically my question comes down to what would be the easiest way to get out of the car (legally). It's a great car, but I just don't want it since every time I see it, I think of how I got screwed. (They sold me the car "new" even though it had 1 other actual human owner not dealer owner)

So would selling it by owner and using like a credit union to pay off the upside-down part of the loan would be smart?
Or would it just be easier to go to a car place like carmax and trade it in and have the negative equity go into the next car? (no don't have enough money to cut out the negative equity)

your thoughts?