using buycommand= [price] [command] players can buy commands! The commands are executed in console, so you'll use this as an example: "buycommand= 100 gamemode creative %cp-player-name%"
Fixed console bloat, with the command signs update (1.10.2), anytime a player would hit the air or a block that isn't a sign an error would show up for no reason, fixed bloat errors.
Successfully bought and sold now show the price in the chat