Making a shop
To begin you can purchase your shops at the center of the hub, by the staircase.
Making the shop:
Using the tool you just purchased, you can create a shop by placing the shop item in your desired location then simply shift+right clicking it with the item you wish to sell/buy.
After creation, when you right click the shop base you will be prompted with a GUI. In here you can find all customizeable options for your shop. To adjust the prices we are going to be using the emerald.
Changing buy price: Left click to the emerald and then type in chat in a clear message the value that you would like to sell the item for.
Changing sell price: Right click the emerald and then type in chat in a clear message the value that you would like to buy the item for. To remove the ability to buy items, set it to -1
Setting stock amount/Stocking up
You can change the amount of the item you are selling by right clicking the diamond in the GUI. Then in chat simply type the amount of the item you would like to sell.
To stock up the items in the shop, you can do so by left clicking the chest icon in the GUI, this when then ask you to enter the amount in chat, you must enter an amount that you have in your inventory for it to work. Alternatively you can deposit all of the items from your inventory by Shift+Left clicking.
You can withdraw from the shop the same way but by using right clicks instead of left.
To recieve all the diamonds that were made, simply Shift + Right click the chest icon in the GUI. This will deposit all the currency items into you inventory. You can deposit them back by Shift + Left clicking the chest.
You can set limits to the amount of items a certain player can purchase,
Setting limit on buy price: Left click the gold ingot, then enter in chat the buy limit. This will limit players to (amount specified) purchase transaction.
Setting limit on sell price: Right click the gold ingot, then enter in chat the selling limit. This will limit the players to selling to you (amount specificed) time.
To reset the limits, simple shift right click.
Changing the currency item
By default diamonds are set as the currency for all shops, you can however change this to whatever you need. To do this, when you are inside the gui Shift + Right-Click the shop item management tool (diamond), the item you are holding in your hand will then become the item used as the currency. So make sure before you enter the gui, you are holding the item you wish to change it to!