Define good. Rebuilt, dynoed, and ready to install or one that spins free even though it is covered in barn dust. I have a chance to pick up 5 or so but i am trying to decide if it is or will be worth the hassle.
It seems like the case covers would be worth something if they are in good shape. I imagine you could probably part them out until you get to rust, but it probably depends on the buy-in point if the investment is worth your time to part them out.