Did not see this post until just now, and the bike is already sold, but I have had good experiences buying bikes on ebay. I've bought two MTBs (one for myself, one for DH) and one road bike that way. Also a road frame. In all cases I made sure the seller had good feedback and also that the bike geometry would work for me. There are definitely some stolen bikes/unscrupulous sellers out there, but if you check out their feedback and hopefully exchange a few q&a messages, you can get a good feel for who is a good, honest seller.

So, did you end up buying the bike?