I think that's why the starting price is so low.
I don't mind buying tubes for a little less just to see if it's going to be my cup of tea. If it turns out to be, then I can spend a little more for an NOS one.
Actually, I'd already bought one that was supposed to have under 100 hours on it but never received it. Out of all the thousands that I've spent online, this was the first time I got scammed (not that I haven't gotten tubes that were noisy). Luckily, it wasn't for too much. I still consider myself to be way on the plus side of the equation.