The dealer shouldn't have to check it. That's Yamaha's job. And the keyboard should be built like a football. These are keyboards made for gigging. If there's a buzz right out of the shop, then there is something wrong with the workmanship. Hopefully, just a minority of keyboards have this problem. I will ask the dealer to check the instrument before he ships it to me. I love my PSR2000, so I hope it is durable.

Larry