Create a economy plugin. It should have a gui to buy stuff, to sell stuff, and to auction stuff. Put the prices at random, and make a easy way to change the price: - in config - with /price set, /price add [item name] [new price] Add a ingame command to reload the plugin to add the changes from the server files to the game. it can sync with vault and PlaceHolderAPI for leaderboards and other stuff they need economy for.