Personally, i dont like it, it would go against player interaction. The good trader, does not only have the goods, but also is good at selling those (putting his goods into peoples hands and taking money). The current problem with trading seems to be more about not big enough amount of players, which limits the potencial buyers/sellers for a single trader.
Instead, i think something like open bases that would work like a player ambassady (secret cave should remain secret still), could be a place for interaction with the gang and maybe trading aswell. With fair amount of defences that is to be able to stand of a larger force. Could be like a fortress or a small town surrounded by wall, which could have upgradable buildings / shops / special buildings.
The base/town could be destroyed, not captured, like the attacking team can set a bomb on the generator (which is like a flag, which the defending team must protect), and it counts down, every player on the map will be blowed up when timer reaches 0. And after that, all buildings will be destroyed and it will remain visible only to faction members of the base (the attacking team will not be able to camp the base after victory). Until its power generator is repaired, it will remain unvisible, during that time the owning faction can rebuild all service buildings and defensive towers / turrets / walls / militia in peace, when they think they are ready, they can repair the generator to start everything up (everything in base will be unusable without power) and the base becomes visible again.
