the ferryman is the jack of all trades in mexico. he is the only one who havcross the mexican-american boarder, and he also smuggles drugs out of mexico and guns in. the prices the the ferryman pays for guns is set but his fees are not. he can choose to charge whatever he wants and his prices are subject to change at any time.
he "ferries" people and goods across the boarder by using a wagon to cross the bridges. only the ferryman can cross the bridges, if you need to cross talk to him. f the ferryman is killed then there is no gun trade untill sombody takes his place.