Originally posted by mee Are you not concerned about using a camera body that is second hand on commercial, one time (can't repeat) events such as a wedding? I mean you don't know what that camera body has been through before you got it.
I've purchased many things used, including cars, cameras, lenses, and many other things. Just like any used item I'd spend a little while testing every function when you first get it and make sure it works. I wouldn't buy a used camera and shoot a wedding the next day, but if you use a camera steadily for a week you're almost certain to find any issues that may arise before the return period expires. After that it's probably about as likely as a new camera to develop a random issue.
With regards to cars, some people even consider used cars to be 'field certified' and any initial issues have probably been taken care of already.