So I got a Goblin Mask:
http://xivdb.com/?item/6000/Goblin-Mask

Which it is not a wearable Goblin Cap:
http://xivdb.com/?item/7545/Goblin-Cap

I'm fairly sure it's a 1.0 item... But I haven't yet found any information about it. I did hear on reddit that someone reported getting one from a venture. I assume that's how it ended up on the market board.

Something interesting is the flavor text on it is identical to the Goblin Mask item in XI...

It's a mystery! Can you guys figure out what it's for? Some new event?

Junk or treasure? My guess is junk...but maybe I can desynth it when that comes out next patch?(That is the closest to figuring this out as I've come so far.)