100% agreed. You shouldn't be out anything. He sold it as a real-deal, he obviously can spot a fake (as evidenced by him calling it that on facebook), so it is hard to believe he didn't know it was.
I would be a little wary about the way he is "refunding" you too. How are you to know if the next buyer is being told if it is a fake or not? And if they aren't told, it is your address that they will have if you send it and not his. Plus, depending on how he sends you the money, paypal may want you to send it to the confirmed address attached to that account. If you don't do that, you put yourself at risk of claiming it wasn't sent.
I ordinarily wouldn't be this paranoid on a deal... But everything you have said so far points to this guy being a little on the shadey side.
Sallah