Jim Strutz - Anchorage, AK , Nov 09, 2007; 03:38 a.m.
There are no digital SLR's under $200, so it will have to be a film camera, and probably a used one at that.
Pentax and Ricoh made lenses to fit Pentax M42 screw mount cameras, and also K mount cameras. If the are not the kind that screws onto the camera body, then they are some version of the K mount. The K mount came in a lot of varieties, but they are pretty much all interchangeable. The differences between K, KR, KA, KAF, etc. are all about what advanced features might work on more advanced cameras, and can be ignored as long as we are not talking about autofocus cameras & lenses.
I would look for either a fully manual camera, like a Pentax MX, or the somewhat inferior K1000. Or look for a semi-automatic camera like a Pentax ME Super, or Super A. The manual versions are actually more simple to understand, but are slower to use. Auto cameras are faster & easier to use, but you learn less with them, and many people never seem to learn anything with them at all. That's why photography courses everywhere recommend simple manual cameras like the K1000. You can find them all pretty cheap on eBay, and used camera stores everywhere.
My preference would be a Pentax MX. It will use all the lenses you have, and it is simple to understand and use. It's also a great learning tool.