The easiest way to identify carnival glass is with the website. (e-bay will not let me link to it iff of this page) david doty's carnival glass. (ddoty.com) This site lists by pattern, by maker, vintage,...
Pay close attention to the seller's feedback rating on any item you are considering bidding on. DON'T hesitate to read the negatives if there are any to get an idea of what the seller is like to do business...