Diablo II: Alkor
Alkor is a reclusive alchemist and merchant living in a small hut in Kurast Docks. He provides Gambling services and sells potions. He rewards the hero twice after his quests get completed.
Trade - sells Potions.
Gamble - for a price, Alkor will sell you an unidentified item. Once purchased, the item will be identified and you will see what item you received.
Lam Esen's Tome