Also, be careful of the OM2s. It is a great camera, but there are no replacement circuits for it, and while there are many out there who love the 2s as their primary OM body, if it goes down, it's down. The OM1(n) is all mechanical, and can be repaired almost forever. The OM3(t) is mechanical in terms of actual shooting, so even without batteries you can shoot away. Check Zuiko.com for one of the best Olympus repair persons you can find; John has lots of good info there.
OM1, OM1n, OM2, OM2n, lenses, bellows, Varimagnifinder, (2x) 35SP, (2a) XA, 35RC, etc. I'm a sick person.