I don't know, I don't exactly want to be a downer, but I think we're kidding ourselves to say there's anything special about this frame. No doubt it was a nice frame, but now it's a bent frame. Hypothetically, if you knew who the builder was, and it was someone with a reputation --let's say it was Ron Cooper-- and you had the tubes replaced; would it still be a Ron Cooper frame? I can imagine it being worth the cost of repair; but I can imagine a lot of things that have no basis in reality.
Yeah, I look at the shorelines on the rear dropouts and seat tube, and this quickly becomes a 1970s 531 frame of nondistinct origin, save the decals. The OP's plan of pulling the parts and hanging the frame (or giving it away), are the only sensible things to do. The cost of repairs exceed the cost of an equivalent 531 frame with no damage by at least a factor of 2.