You theoretically have knowledge of the playerbase's total purchasing power at any moment, as well as the amount of cash in circulation in other sources (NPC shops, carried by NPCs, etc.).
It might be worth tracking that data over a period of weeks to months to see if it fluctuates significantly. If it does, an inflation dynamic could keep prices in line with values. If it doesn't change much, it's probably not a topic worth caring about.
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