H.L.

Reaching H.L. requires a long trip and used to be dangerous (in the event of lured monsters). H.L. doesn't pay you incredibly well, but he buys many items that cannot be sold at any other shop, although most of those items are more profitable selling to other players.
H.L. seems to be especially hostile to females, in earlier times he even refused to trade with them. In earlier times, people only used to come to him to sell Scale Armors, but when these could eventually also be sold to other, more nearby Weapon Shopkeeper NPCs, he became more and more lonely. Another cause of this is that the items he buys aren't well paid for. For example, he buys Demon Armors, Dragon Scale Mails and Magic Plate Armors for less than 1000 gps. He even buys the legendary Blessed Shield for a mere 650 gps!