I sold a MIDI interface that was working perfectly and the buyer ( apparently an incompetent moron) returned it as "broken, not working, doesn't power up". I tested it right away and was working as it should. I asked Reverb to step in and I gave them two videos proving that the unit was working, and they stop answering my request to updates about my case. They cut me off the chat and every time I ask a question the chat ends abruptly. Worst customer service ever, they care only for the money they make, nothing else. Good luck to them: I blocked the credit card related to my account.