I sold a t-shirt through Stockx, but when they received the package, they claimed that the box was empty, and returned the package (Yes, these surprisingly incompetent people actually shipped an empty box back to me).
They told me that the box wasn't tampered with (although the tape i put on it had obviously been broken) and therefore they didn't want to refund me.
Furthermore, I can't file a claim with UPS without their help because they paid for the shipping label - but they don't want to help me with that either
So they basically lost my package, won't refund and won't even help me file a claim with UPS, so I just lost a bunch of money because i trusted this company.
Worst customer experience I've ever had.