I picked up a Petri 7S on eBay for the princely sum of $5 plus shipping. It looks good and the rangefinder and aperture appear to work (don't know how accurate the rangefinder is, though), but the shutter speeds all seem the same (fast) except for B, which works the way it should. Does anyone have any suggestions for what might be causing this? I have not put film into the camera yet, but I don't think the Petri's shutter cares about that, does it? I'm willing to make this a project, since the camera was so cheap, if anyone can tell me how to fix it. The meter appears to be dead, but I'm not too surprised. Then again, I've heard that selenium cells need some time to wake up after being in the dark for a long time, and this camera has been in a never-ready case for who knows how long.