Sell Multiplierand Buy Sale#89

shopgui.sellmultiplier.2 = When the player sells something to the shop, earns 2x money

shopgui.buysale.2 _ When player buys something to the shop, x/2 buys cheaper

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upupupupuppp

There are already permission based price modifiers working exactly the way you described. Please see https://docs.brcdev.net/#/shopgui/price-modifiers?id=permission-based-price-modifiers for reference.