There were several attempts in the past to create unofficial trading events.I believe my old group (Lost and Found) and a now defunct group called K9 were the only ones to execute it successfully. We did it in Chapaevsk above Chernogorsk and did it by occupying the apartments and communicating through a radio on the ground. K9 did it in the graveyard of Pustoshka and blindfolded and handcuffed the traders and made trades that way.
What I'm saying is if you want to do a trading zone.
1.You need a well organised group
2.You need to do it well out of the way of the PVP area so that one of the squads(NORTH,Yolo,SOA,SQL,USS,White pilot helm) either stumble over you during a fight or randomly decide to fuck your shit up.