You gave it to him with barrel number one, but you forgot to pull the trigger on the second barrel!
He was having a bad day, was he? Did he find out that someone was selling his intellectual property passing it off as his own? Somehow, I doubt it.
You let him off too easy. Technically, you have this guy by his bunghairs and you should have pounded that fact into that tiny head of his.
As of this writing, he still hasn't bothered to take down the auction. What a fool.
APf