I had never seen the $50 China groupset thing until today. Today I saw $48 for a Campagnolo 9-speed build kit -- ergo shifters, crankset, bottom bracket, chain, rear derailleur, brakes. Free shipping! Two available! Zero seller feedback. The picture is stolen from another ad selling the same stuff from the US for $399. That makes me nervous just having the ad open in my browser.

I've bought things from China and never had a problem, but this is blatantly a scam.