What worries me now though is if somehow he really didn't mean to sell an illegitimate copy. Perhaps I'm just being naive, but I wouldn't have scrutinised it as much if he hadn't said anything before it was sent. Surely, if his aim was to make money, then he wouldn't have said anything at all.
I've also got a full refund now, and he's just said to bin the DVD, which I would be surprised about if he wanted to sell it on again.
Lastly, pretty much all his feedback is positive, and the 2 that aren't (one neutral and one negative) are not about DVDs.
Maybe it's his politeness and seemingly willingness to get it sorted properly that's got me confused, but I don't see how he can be dodgy after all he's sold and all he's done...