Picked up my first today while out and about. Retina IIc. Not hardly a mark on it. The shutter seems to work until you get below 1/30, then it wants to hang up a bit. That's the only thing I can see wrong with it, although I don't know anything about it The rangefinder seems to be on, viewfinder pretty clear, and the lens nice, clear and free of marks.
I probably overpaid at $65, but it was too cool to leave there in the condition it seems to be in.