Personally, I think that it is a brilliant idea that would slowly gain steam and then take off.
It would be a great way of weeding out the dross and counterfeit ripoffs that one finds, at times, on evilBay. (Me bitter about being burned for bogus collexxtables? Heck, no. Hey, Salter Street, thanks for never responding to my e-mails about ripoff artists flogging unlicenced crap knockoffs and bootlegs of the Brigadoom soundtrack. Bootlegs should be free. That’s why there’s p2p. :wink:)