Made an old post saying how AD, eh, and DF factions share the same guild traders which I thought was bs to fight over them. Now I don't know if this is glitch but quest you do can change instance replaces guild trader. Not sure if this is all over the game but the trader in green shade by seek better sales splits if you do or don't the quest.
Right now if you have not done the main quest you see traders united that owns it, if you done the main quest you see weapons traders that owns this.