[woody]

If he wants em back send em but make sure he pays the return postage and of course petrol money and compensation for your time.

Nothing harsh about your reply though, well written save for the slightly dodgy spelling/grammar

[Sooper]

I think your reply did the trick. Scare tactics seem to be pretty effective and the only thing these shit sellers seem to respond to.
You didnt use the 'ol Watchdog line though!!
Anyway glad you got your money back in full.