I noticed price differences for a Canon 7D.
The quoted asking prices for sale of a 7D on this forum are generally higher than the one on Craighlist for the area of Los Angeles and Orange County in SoCal.
Brand new and never been used with Canon USA waranty for $1250 and used for not a year for as low as $1000 including all that came with the box and just 3000 actuations.
I have seen also a 5DMKII going for $1700.
I have red several warnings about Craighlist, but when a seller offer an item including the original information, you can meet that person and are allowed to try the for sale stuff, I think that might not be a problem.