Any advice for a trade gone wrong?

Not going to list the name as I think that is not kosher here.

And yes, I know, I was too trusting and in the end it was my fault, but that is neither here nor there now. Posting here to see if I have any options, and if not, at least warn other people off of this guy.

I was trading a trans negation + r11 bonding fully refined for a legendary griffon mount. I was 1M AD short on the trade, we agreed that I would give him the items and he would post the griffon for 1M AD and I would buy it out as soon as he posted it. I gave him the items, he counted down to posting the griffon, but then left the party instead.

Again, stupid me for trusting someone like this - lesson learned for sure. Am I just hosed at this point? I've submitted a ticket through the arc forum. And I quickly found another person that also got scammed by the same guy. Best case, maybe he gets banned I guess.

I have his in game name and gamer tag, but not posting it here. I would be happy to message the info to people to beware of this guy. He is a big seller in the AH and I'm guessing more than a few people here would recognize the name.