I have participated in a group buy. What kind of info are you looking for regarding them because each one is different. There is a trend though with the CEG group buys on a whole. Many say they want something but when it comes time to put up the bread they all scury away. I just finally got the goods from my GB that I was in. It took over a year. We are thinking of a rubber seal GB here in the GTA forum. Chances are this one would work a lot faster as most of us know one another and aren't out to screw each other.