Looking at a lot of the posts on the forum, there appears to be quite a lot of 5d mkkiii units returned because the customers did not think they were functioning correctly. What happens to these, does the seller ship them out to somebody else as opened packages or do they get sent back to Canon? If they are sent back to Canon, what do they do with them - do they refurbish and sell them as refurbished or do they check them over and sell them on again?