I am trying to build an item shop, based off of ones I have seen in other servers. Basically, you right-click a chest. It tells you how much gold it costs to buy something, and sell something. To buy the item, you put in x amount of gold in the chest, and right-click. When you open the chest, the item is in there. It works the same when selling, just in reverse. I asked some moderators on the other servers how they do it, and they just said it is with Bukkit. Can you guys help me here? Thanks. IP of a working example: mc-endgameserver.com:25565