I wanted to share my experience getting what I think was a good deal on a used T3i.
Craigslist: $400 body only but no idea how many shutter counts are on it. Talked him down from $450 body only.
Canon Refurbished: $384 body only (now $480 after the rebate was done)
Canon Refurbished: $431 with kit lens, this is what I got since the body only units went fast. I went ahead and got it because my neighbor is going to buy it from me after I am done with the course.
Here is the link where I found the Canon T3i/600D refurbished cameras, note that the price has gone up again.
I am on the mailing list to get alerted when these deals come around.