Shop Creating
Get a chest and a sign.
Place the sign on the chest. (Use “Shift” to place signs on chests)
Type “[Shop]” on the first line (default)
Either by Anvil or by Chat, name your shop.
Right Click the sign to open the shop.
Setup Done!
Add Items to the Shop
Buying:
Open the shop
Click an item in YOUR inventory to add it.
Selling:
Open the Shop
Change to Selling part of shop