Gui Sign Shop [1.12.2] [DISCONTINUED]

Features:

This plugin allows you to easily create buy/sell shops for your server! Just place a sign with an appropriate format and right click it!

If it's a buy sign, you will get a GUI where you can select the amount of the item you want to buy! You can left click on an item to increase the amount of items bought and right click on an item to decrease the amount of items bought. View the amount of items in your current "shopping cart" and total price by hovering your mouse cursor above the minecart in the GUI.

If it's a sell sign, you can sell all the items of the item entered in the sign in your inventory!

Spawner support! Spawners don't turn into pigs when they're placed!

Permissions:
guishop.use: Able to right click a buy/sell sign.
guishop.admin: Able to create buy/sell sign
guishop.spawner: Place spawners
guishop.load: Access to the /guishop reload command.
guishop.*: Access to all the permissions above

Commands:
/guishop reload: Reload the files
/guishop [stickysign/ss] <name> : Create a custom item shop

Config:

Prefix: "&c[&4Gui Shop&c]"
No-Item: "&cYou do not have enough of {item} in your inventory!"
No-Perm: "&c&lYou do not have permission to create a sign!"
No-Perm-Cmd: "&c&lYou do not have permission to execute this command!"
New-Bal: "&6Your new balance is {bal}!"
No-Item-In-Cart: "&6You cannot buy air! Please select items you want to buy!"
No-Money: "&cYou cannot afford the item {item}"
Full-Inventory: "&cYou don't have enough space in your inventory to buy the item!"
Transaction-Cancelled: "&cThe current transaction has been terminated!"
Transaction-Successful: "&cYou have bought the item(s) &6{item} &c!"
Currency-Sign: "$"

Requirements:

1. Vault installed
2. An Economy plugin

A nice review about my plugin by @Theonicle

Format to create a buy-sign:

Format to create a sell-sign:

How the GUI looks when you right click a sign:

Steps to create a Sticky Sign: