The Weapon Seller Gnome ran the Weapon Shop in the Underground Realm of the Gnomes.
He will sell his hammer full price if the customer doesn't have any other weapons to trade in. He gives discounts for trade-ins. He offers discounts on trade-ins for his bows.
Behind the scenes[]
He'll also comment on the piece of shield/rusted shield if you show it to him. He will also refuse to trade for the black diamond spear, as it is needed for a quest.