I'm using CBid all the time right now. I'm trying to build a collection I can smoke now and age at the same time, starting from scratch. I bought the Padilla Obsidian bundle, and have bought a bunch of Rocky Patel, Gurkha, 5 Vegas, Fonseca, Padron, and Romeo y Julieta cigars, all for under $3 a stick.
Then again, I've also been buying Padron and A. Fuente cigars from Taboo. So far, the Hemingway Short Story is probably my favorite cigar, and the auctions on CBid ended HIGH but the cigars were very reasonable at Taboo (thanks to the 33% off coupon!).