Allows players to make shops. Craft it and place it on the ground. Right click with an item (for example emerald) to set the price. Right click again with the item you want to sell. The stack amount that you are holding will be the amount to sell/buy.
For example: You are holding 16 diamonds in your hand. Right clicking the shop will set the price to 16 diamonds. Then if you hold 5 cookies in your hand and right click the shop again, you will make it cost 16 diamonds to buy 5 cookies.
Add a stock viewer so that you and others can see how many cookies remain in the shop. To add more cookies, just have them in your inventory and right click the shop with an empty hand.
Multiplayer