The Broker, Sells your Weapons, Gear and Items for you.
You can place one of each type on the Broker (1 Weapon/Item/Gear). The Broker will then list your Weapon etc amoungst his goods, he will charge a Tax for his services (reduced by Distribution Skill )
All Items etc on the Broker are Player Owned, this means players set the Prices.
For the Brokers position in your Faction please visit your Factions page through the Faction List