It could be said that there was around 2-3 Treasure Hunter npc's in each town of Haven Online, you could even find some out in the wild searching for Treasure. While this class wasn't popular with players it was certainly a popular one for NPC's
Xinya knew exactly where to go when looking for a Treasure Hunter NPC, the marketplace. Although there is an auction house, each town also had a marketplace where players can go and set up shops. There were different types of shops that players could set up, they could rent or buy and actual one, they could buy a cart to sell from, they could sell from a vending machine or they could use the cheapest option and get a personal shop briefcase and sit on the ground and sell items. This is what most Treasure Hunter npc's did.