So, when I bought the Rebel XTi, my intention was to use it for a year or two and then pull the trigger on whatever the brand new version of the Canon Rebel line was at that time. I've enjoyed it and taken some slammin' good pictures with an initial cost outlay only a fraction of what buying new would have been.
While I was up in New Hamster, though, I got a chance to coonfinger Marko's Oleg-hand-me-down EOS 10D. For those not hip to the Canon nomenclature, those two-digit model number cameras are the "semipro" ones in Canon's lineup. A magnesium body and actual pentaprism make for a much more substantial-feeling camera than the all-plastic, pentamirror-using Rebel. I got a little case of the wantsies.
The 10D wouldn't accept my EF-S lenses, but the slightly newer 20D would. And used 20D bodies were going for barely more than a hundred bucks at KEH Camera Brokers... So, yeah, I did. Now the plan is to use the XTi and the 20D side-by-side for a year or two, before deciding whether to buy a new Rebel T7 or whatever they're up to by then... or get a lightly-used 60D or 70D.