3 weeks after my 1st shoe purchase over $400 at resale price, fails authentication on stockX. Buyers beware. Wish I knew this before I made multiple purchases. Will update after I hear back from whatnot. Hoping my other purchase pass authentication after making multiple buys. I dont think they verify items, so high price items I would stay away from. UPDATE- 8 WEEKS. No response, money back OR support. No one helped me or the situation. Nothing has changed. I WOULDNT BUY ANY HIGH END STUFF!