Unfortunately you have to have your trusted seller badge in order to post a BIN/GIN. :( the option will open up when you are in the area for setting the starting bid. I am watching this auction, and fanning you :) come by my auctions if you like comics ^_^!
Please know that it was never my intention to 'rip off' a seller, that was just the maximum amount of credits I had at the time and was willing to bid everything I had.