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Atis Is that even supposed to make sense? All player actions in games are metered by economic principles. There is nothing in games which aren't economics!
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Mikhaila Very good points; although an argument could be made that constant shortages and resistance in trading are features of an unhealthy market.
I think the bigger problem is information asymmetry and the difficulty in actually dealing with other players. Finding the shop you want in the pile of shops is really painful; I really do wonder if anyone makes back their coin in the second room. There is a quantifiable benefit to being in the first room.
(Also, it's just painful to try to walk from one seller to another. I really really wish the player character would path around the displays and other NPCs.)