A black market feature that allows players to name what item they want and add a price for example say i want aqua force but can find the right price on the regular market I will say it like thisi
[Item] Aqua Force
[Buying or Selling] Buying
[Name Your Price] 800tc
[Status Off or On] On
And another player will click [Sell] and sell it to G23
And u will have the controll to turn your black market offer on or of so people don't spam [Sell]