deposit cashed on a supercar

[black69]

I think I have a case, I do not have a lawyer though, need to find one that specializes in cases like this. Something is up because he wants me to take back a refund and cash it. If I take back my deposit, then I effectively walked away from the deal. I read once about a guy cashing a deposit on a rare mopar convert and 1 yr or so later the court made it go to the guy that made the deposit (the fact that he cashed the check consimated a deal). The check itself is my main contract I have(it has the serial number and description of car, and is described clearly as a deposit on such, it was not a basic check). I had the sending bank and receiving bank notarize the check after this all happened. I have voice mails and phone records. This car is well in the 6 figures, and was not to have been built. It has not left his premises yet either. I can use any help, but going there with a trailer ain't gonna work. Need a good musclecar lawyer or advice on whether I am truely screwed.