Do not sell to this ebay user. I sold him a tested working hopper and even included a spare secure count board to fix his original faulty hopper. He said the hopper worked for a few coins then stopped as I was trying to find out why the hopper was having an issue the guy stated that both the board on the hopper i sent and the spare board fried out as well as the knife somehow got broken. I tried to explain that it sounded like he had a bad io board and damaged coins and the guy started getting irate accusing me of lying even tho he clearly was lying. Accused me of being a crook and called me a dumbass, and not waiting for responses. I went way out of my way including offering to send him a replacement io card control board for the hopper and knife at no charge to him but all he cared about was calling me a liar, getting a refund, and threatening to contact ebay. After the guy admitted to doing the same exact thing to another seller i ended up just giving him his money back and reported him to ebay myself.