I just got a K1000 with an SMC-A 50mm f/2 for $8 from my local Goodwill. The shutter is jammed. I got it because I figured even if the camera isn't worth getting repaired, surely the lens is worth $8 on its own. Does anyone have any guesses as to why the shutter may be jammed? The K1000 always struck me as a bare-bones camera, so hopefully it isn't too hard to fix. Thanks!