I emailed the guy and offered him a refund if he's that unhappy with the item. I hope he takes me up on it, since I was unhappy with the price the thing brought, and I wouldn't mind having it back.
I've probably sold half a dozen of these, and I haven't had a complaint until now. I've also clarified the listing over time, because I don't want people being unhappy. I think it's written pretty clearly, but I guess that doesn't matter if people don't, or can't, read.
Whatevers.... I knew it was going to happen one of these days.