Hot damn that's a kink!
I agree with above. If it was just the frame you could replace it with some square tubing. But the body is seriously tweaked judging by that door and it would be the an extremely expensive nightmare to get it halfway right again. Unless you don't care that much about the body, I know some people like that. A cut-and-patch would probably be the only (reasonable) way of going about it
Finding another for cheap and swapping everything over would be the move; preferably something with a major failure like a burnt out tranny or blown head gasket. Usually when that happens to people they list it for a "get it the hell off my driveway" price. It would be a fair amount of work but nothing compared to straightening everything out - and you'd probably be ahead a solid $10-20,000 at the least