Market Board is the market system in Final Fantasy XIV. It has been implemented in A Realm Reborn to replace the Market Ward. They can be found in the market wards of the main city-states, as well as the residential district.
The Market Board is similar to the Auction House system in Final Fantasy XI, the players can sell their items on the board after they assigned their retainers to the market. All the market boards throughout every city are connected together, however purchasing items sold in a different city incurs a slight fee.