I always say when I last tested or used something I'm selling to give the buyer some idea of how much risk they might be getting into. Especially old floppy disks, but then I always say that they also might not still work because they're old. The idea is that I've told them what to expect because I don't really want the hassle of having them return it. And, mostly, because I don't want it back at all. :-) I've used untested before, but not when I know something is broken, just when I've never used something I'm selling or if it's been quite a while since I've used it. Fair warning is the key. And, caveat emptor canem. ;-)
