If I can't give them away, then I scrap them out. I'm not going to warehouse derelict machines. I have bought a few just for parts, and I've ended up with more that came with cabinets I was after. Since DH is my mechanic, I'm not going to buy anything that needs more work than he's willing to give it.
I've got several machines that are in rough shape cosmetically, but they are much older and quite rare - so worth saving for that reason.