Yahoo auctions allows the sale of cigars, but, in my experience, you are best to leave the auctions to cigarbid. They at least are backed by a reputable store, they tend to have some unusual stuff as well as the possibilities on great buys. You really need to know you MSRP or local shop pricing though as the same bid wars that happen on ebay happen their, and I've watched people over pay for things by leaps and bounds!
On a side not, I bought a plastic handled Xicar cutter for 20 bucks or so, which was good, so...Good luck.