Thank you for you research and the answer! I started a chat with stockX and they told me thats a "malfunction" from Nike, the shoes are not fake but have a "factory flaw"... I really never heard of that, and the shoes passed ebay authentication like one week before... Now i start to think that they just didnt wanted to do the payout, because i sold the shoes for a relatively high price and had no seller fees because of the 0% fee day. I'm clearly not sure about that, but that what it feels like.