These things aren't as breakable as people make them out to be. I have a canon elan 7n (the canon equivalent of the nikon F80 or N80) and it's pretty solid. Don't listen to these old codgers with their ancient metal cameras

(Hey, I have a couple too - a 1945 rolleiflex, still working!). Granted, an F75 isn't going to last as long as some of the stuff in ksmattfish's collection of 100 year old folding monstrosities, but it'll do for your photography class and a good many years of hobbiest photography afterwards.
I would seriously look at the canon elan 7n though, it's a fantastic camera in my opinion. And currently canon has a better digital SLR lineup which means you can upgrade more happily and keep using your existing lens(es). Of course this could change, but right now canon's got the edge.
My recommendations for automatic cameras: Nikon F80 or Canon Elan 7n (these have cable releases, film ISO selection, and straightforward manual operation with full control).
If you can't afford these, the F75 (N75 in USA) or Rebel T2 are decent options. You can get an infrared remote control that works like the cable-release people are talking about for those models, which is almost an advantage because you don't have to touch anything connected to the camera to trigger the shutter this way.
If you want to go old-school and get a fully manual camera, my votes go for Canon A-1 (or "AE-1 Program"), Pentax K1000, or Nikon FM2n or Nikon FE-2.
To summarize:
Autofocus: Nikon F80 (N80) or canon elan 7n (fully manual, modern).
Manual focus: Canon A-1 or AE-1 Program, Nikon FM2n, Nikon FE-2, Pentax K1000 (may use obsolete lenses, but less expensive and simple).
I would check "www.
keh.com" for used camera bodies, these guys are pretty reputable and have a reputation for "underrating" their equpiment (ie, something they call "Excellent minus" is what others would call "Like new").