Oris Aquis discounts on Ebay

Hi, looking to buy an Aquis and just decided to check Ebay to see if there were any good deals to be had. There were many listings from about the same two dealers who were practically giving he watches away at 35%-40% discount. I can't tell if this is a scam or not. Could someone enlighten me. I usually say that if something is too good to be true it usually is but I just want to verify. Thanks.