The Baron is not sophisticated enough to allow merchants to operate in his base – he simply ‘appropriates’ any wagons of merchandise that fall in his grasp. Having said that there are opportunities to trade quietly with the men of other units for equipment and goods. The militias (who are generally less well equipped) would be willing to trade for Mausers and shotguns as this is what they have ammo for. They would be willing to trade food or perhaps an AKM. What they won’t trade away is ammunition – it is in short supply and increasingly valuable.