i'd want to know a bit more about the head before getting in on a group buy... but yeah they do kinda work, but need to be organised by someone senior, trusted and accountable.. ie: a mod..
I've been in group buys on an Aristo website, and that worked well...
Oh, and Spoonta, are you on drugs? DHZ are constantly offering discounts to MR members....
Ken is renowned for knocking back prices if you mention you're an MR member..
Russ has only been a site sponsor for a wee while, but is already offereing good deals on bikes and parts, what small amounts he does have to date....
as for the other sponsors, yes, they're a bit on the quiet side....