Maybe it’s time for a “black market” in PL. A seperate NPC and CS altogether?
Basically, this is the way the trade window is used now “off market” or “black market” trades. The current CS is only a price reference point, and it’s expensive to do that. It cost to much just to set a market price for items. Even in trade windows deals the CS price is always mentioned.
Introduce “Black Market” items only tradeable in the “black market” CS.
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