This is a multistack item shop you can use on servers that will display how much stock you have left, lock if you don't have enough stock to fill the order and all have to do is adjust the timing on the pulse extender (Be warned if you have set the stacks high and someone put in a diamond the but you don't have the stock to complete the order lock will not work properly and they will not get there full order) to determine how much one diamond is per item dispensed.

Dimensions are 3 Wide 5 Long 5 Tall
If you do use this in videos please give credit.