Fuente Maduro Opus X, which are incredibly rare, were being offered week after week for months as singles on there and were selling for $40 a pop, which while a crazy price now, was even crazier back then. Someone bought a couple and showed them to Carlito Fuente at an event who declared them fakes and said he never sold any Maduro Opus X to CI/CB. Shortly after that, all of the Fuentes disappeared from CB for a couple years. I recall old Fuente-heads posting pictures of the CB fakes alongside known real Maduro Opus and the difference was striking. The CB offerings had much different, lumpier wrappers, uneven bunching, and the band wasn't even right. I also recall people smoking them and pretty much reviewing it as "What the hey!? These don't even taste Dominican, let alone like an Opus." Some folks posited that they were Nicaraguans. Very bad fakes, either way, but, boy, did the pictures on the auction make them look alluring (and slightly out of focus).
I saw some of the fakies get sold a few times at Online Humidor for a while, but once word got out, they disappeared from the secondary market. Who knows where they are now?