I’ve been overhauling a few derailleurs, and realized that the cage on this Cyclone is deeply grooved. I didn't notice that before I picked it up at the coop. Obviously, someone ran this derailleur while it was rubbing for a long time.
Dissappointing, but I don’t know if wear in this spot would affect the operation of the derailleur. Is this derailleur usable? Is it salable?