Hello Aternos! I would like to suggest the Plugin SimpleShop!
Site: https://dev.bukkit.org/bukkit-plugins/simpleshop/
Description: This Will Allow by Cmds to buy Items And Sell Items In Minecraft! Ex: 1 Diamond for 2$ (Vault Plugin Dependcy, Vault Using Plugin ex: UltimateCore, Essentials)
-BlazingOne
