Canon left a lot of photographers miffed when their EOS (Electro Optical System) prevented old FD mount lenses from working on their new EF mount bodies. But Canon was compelled to develop a high performance autofocus camera given the AF competition from Minolta and Nikon in the mid 1980’s. (Just in case you’re wondering, the first EOS camera was released in 1987—Canon’s 50th anniversary and Eos is the goddess of dawn in Greek mythology. Get it?)
In 1989, Canon introduced a more advanced, pro model in the EOS-1 and followed it up five years later with the EOS-1N. It was their most sophisticated camera to date, with 5-point area AF (impressive at the time), 16-zone evaluative metering that was linked to the focus point and other features that made it a favorite among professionals. It kept its flagship status for six years.
The best part about buying this SLR right now is that it'll work just fine with all of your current Canon lenses. That saves you money in the glass department.
KEH: starting at $179 (with power booster)
Ebay: starting at $179 (body only) Craigslist: starting at $250 “or best offer” (body only)