A chip where 2 are known is probably worth less than a chip where only 1 is known, but I would hardly call it worthless. In this hobby, especially on ebay, the term "rare" can be used very casually, so as to take away its meaning. Your chip, however, is rare. Do not give up hope. You have some nice bids already, and the real bidding always occurs right at the very end. You have a VERY nice chip.
I would contact James Campiglia, however, to see why there is a picture of a second chip, and to get his opinion. Best of luck.
Michael Siskin