Is there a reason for the mysterious gigglegibber to be spawning in the coliseum? If you hail him he asks if you want to buy a ticket and you get directed to the marketplace to buy a goblin game ticket. Wasn't this phased out a few years ago?
Last time I looked, you could not buy anything, it was all removed from the marketplace, when you went to buy the item it said X number of Goblin tickets. I don't have any tickets left, someone with tickets may still be able to see items, I really do not know.
If you have goblin game tickets, you can earn the currency and buy stuff. Not too long ago, I finally used up my last 50-70 tickets (I was hunting unattuners).