Canon AE-1 + 50 f1.8
Pentax k1000 + 50 f2/1.7
Pentax ME + 50 f2/1.7
Some Minolta Shit
TBH really any 35mm slr with a fast-ish 50 will be a kick as intro to film. Buy something local and cheap (Craigslist/kijiji are good, just do a thorough inspection) or hit up your local camera shop to see if they have a used section.
http://keh.com also has a really large selection of 35mm gear.