Legends of Mystara
The Craftsman Guild facilitates hardware stores and construction inside of Darokin. Members of the Guild can vote upon mutual pricing based upon quality. Undercutting other Guild members is greatly frowned upon and may carry consequences within the Guild. Craftsman Guild members that own stores try to sell different, but complementary, items than other members. This plays out to the advantage of all members of the Guild. Masons and Carpenters in the Guild often work on larger projects cooperatively, with a price negotiated between the members.