A One-Round Living Greyhawk Nyrond and Her Environs Meta-Regional Adventure
From the introduction:
Trade in rare and powerful items — some of them magical — is a fact of life in Greyhawk. In the course of their violent — and often brief — lives, adventurers come into contact with a lot of them. Once they have found these items, there is another challenge: Selling them.
A Living Greyhawk Nyrond and Her Environs Metaregional adventure set in the Theocracy of the Pale for [character levels] 2 - 14.