I was looking at the N90s, which can be had for under $30 now (I remember paying a lot more that for one new a decade ago). I am open to suggestions though. I tried a rangefinder, but just didn't fall in love with the ergonomics, and the only cheap options have fixed lenses. So, looking again at an SLR.
The camera will stay in my bag, being used to take photos when I'm not carrying my main gear (Hasselblad system). I'm only planning on running B&W film through this.
Good lens compatibility
AA batteries, decent battery life