You can email the seller to let them know their mistake, and email eBay to point out the problem. If it's not a private auction, you should be able to email the highest bidder to let them know, but I'd be very cautious about stepping in between a buyer and a seller. You better be 100% absolutely certain. I mean, certain to the point of absurdity - like somebody selling their 1960 receiver that also has factory DTS-neo.