[harkins2011]

If you sell art in shulkerboxes on the server, then you are probably familiar with the following problems:

1. itemID may sometimes desync between chestshop inventory and shopsign,
   
2. Every shulkerbox needs to have the same order of items in it,
   
3. Every shulkerbox needs to have the same amount of each item in it,
   
4. etc.
   

I discuss a few ways to sell shulkerboxes of mapart in the following video (though it is not necessary that these have to be shulkerboxes of maparts, they can be shulkerboxes containing anything you like---just many people sell shulkerboxes in the context of selling art). 

https://youtu.be/L8emJ0jyUTM?si=uauJRJIvVcX2FZyS

Attached to this thread is a .zip file containing the schematics for the devices shown in the video.