I've bought Rebel bodies for US$6 from KEH; Rebel X and Rebel G, I believe, but there are several low-end alternatives that sell for similarly ridiculous prices. Honestly, I think unless you want to use some particular spiffy feature, there's not much to choose on other than price; they all hold your EOS lenses in front and keep the dark in in back, they're all cheap-and-cheerful wunderplastik cameras built with good quality control to a low price point, and they should all be good enough at metering and focus for a competent user.
If you're shooting action situations that demand 16384-point autofocus and super-duper-precognitive-evaluative metering, or something, the differences between models come into play. But as a convenient p&s, I'd say just get the cheapest body you find at KEH. Heck, at those prices, get three or four so you have some backups.
-NT