My 2 cents. "Second Pressing" or worse "Pressing" is an accepted standard euphemism here for a bootleg or legitimate reissue. American buyers are not used to those terms as we in general don't have to deal with buying bootlegs. I got burned a bunch of times when I first started buying from overseas sellers. People here take it for granted that buyers know this terminology and by saying "do your homework" -- what was he supposed to do? Also, nobody is used to paying more than $10-$15 for a reissue, a $50 price tag makes it look like it's being represented as an original. I AM NOT SAYING PETE MISREPRESENTED THE ITEM IN ANY WAY, I am saying how an American who is not used to buying 45s from overseas might read it.
That said, Pete did provide good customer service, and the buyer had the manship guide so he could have confirmed everything himself. I'm guessing one of two things happened -- a) the buyer felt that Pete was intentionally misrepresenting the item with the standard euphemism "2nd pressing" that he didn't understand was a UK seller standard (and then he got mad) or b) the buyer was just a dick and wouldn't admit he was wrong and just send it back normally.
Either way, the worst ebayers in the world are the ones who commit chargeback fraud, keep the record and the money, and leave you intentionally slanderous negatives. I don't think that's what happened here, there clearly was buyer misunderstanding at some level, even if he was in the wrong by the end.