Matt-
It's likely you can buy a new, or at least much newer film camera for what it would cost to repair this one. At the minimum, it will be much easier to just buy another camera. Since I've never heard of it, I doubt it's a great camera. It's the lenses that really count. And without seeing some good scans, it's really hard to know whether it's worth messing with. But like I said, since I've never heard of it, I have my doubts.

I realize that's probably not what you wanted to hear. But maybe it will help you make a decision about what to do. If you absolutely want to fix it, my guess is it just needs some lubrication in the mirror assembly. Personally, I wouldn't try to fix it myself. But since I'm suggesting you buy a new camera anyway, maybe it's an acceptable risk.