Benson
From The World of Dreams Manual
Benson is an NPC that will take your unwanted magic items and will give you points for them. He is located in Eastern Yew approximately Southwest of the moongate. The points you receive will vary by item, and the better the item, the more points he will credit you. Once you accumulate 100 points, he will sell you a magic oil for 10,000gp to apply to a weapon or armor to make it magical.