I've bought a lot of things from Mr. Bryce. I've never had any issues other than some spikes for a ms460 not lining up right but I just filed it down so it was a non issue. I know he has a few helpers to help him out, but when you have and move the volume he does I'm sure it's very difficult to keep up with the flood of questions you get when it's only you and a couple helpers. I can't say I've ever bought used items from him, I try and stick to new/NOS just because he can't possibly test every used item he gets.