Yes, if you're considering OM camera bodies OM-1 OM-2 and OM-4 (ti if poss) are all worth a look. Better to avoid the double numbers (20, 30 and 40 etc), which do tend to suffer electrical gremlins....In all cases, check the 'click' positivity of the on/off/bat test dial. The test function is next to useless, but the wear of the click stops on that dial (the one beneath/around the rewind lever) is normally the first thing to get loose and a good indicator of how worn those bodies are.
OR,
What about a Voigtlander Bessaflex TM SLR? Compact design, incredibly clear bright viewfinders, beautifully made, and nice lenses....and its going to be less than 30 years old. I can't emphase how bright and clear the finder is. Admittedly, on paper it looks pretty boring, but the example I picked up was a pleasant suprise...almost breathtaking
http://www.cameraquest.com/voigtFlexTM.htm