GC on-line is wildly hit and miss.
Assuming you mean "used on-line," I fully agree. Indeed, "used on-line" is hit-and-miss just about everywhere IME.
I buy used stuff from GC on-line once in awhile, but only because I live about 10 minutes from a GC store. If it's junk, I'm driving it to my local store and getting a remedy on the spot. Otherwise, I'd be very careful ordering used from GC.
I also call the remote GC store about used gear and talk to a staff member. I have him open it up, plug it in, test it out, look it over with a magnifying glass, and have him help me decide if it's a keeper or if I'm going to end up returning it.

