Canon has refurb stations around the world where they are tested and repaired. Don't expect to see them soon, since spare parts are probably not available in large quantities.
Some of the cameras may also appear at sleazy web sellers stores and sold as new. That used to be common, they would have a connection with a authorized reseller and buy the returned ones that seemed to work for resale. It happened to me once, after that it was B&H, Adorama, and the many good camera stores. Back then, I did not know which was which, there was no Internet - well, I actually had used it while setup in its early mode before it was publically available, but only for a very few functions, since it was all Unix commands, not even Gopher as I recall, just newsgroups at universities and a few tech companies.