A friend gave me a 1969 500c body and a 1978 A12 back (with matching insert, if that matters). It appears to be in decent shape. I would say that for its age, it looks to be about Ex by KEH standards. There is a slight amount of paint loss around the lens mount and a few minor scratches on the base near the tripod holes. The tripod threads themselves are fine. There are two things that concern me a little: there is a slight amount of play between the body and the back and the little pin inside the shutter release button (for the cable release) looks corroded and possibly bent. As for the play, it is only enough that when wiggling it, it makes a small, but audible click. Is this normal or could it be problematic? Is the pin a potential problem or is it typical (or at least replaceable)? I guess what I am ultimately asking is if it is worth investing in a lens and cla with someone like David Odess to get the camera going?