The current config in GUI shop for Items looks like this:

    "NAME OF THE ITEM": {
          "buy": "BUYPRICE",
          "img": "URLOFTHEIMAGE",
          "item": "RUSTITEMNAME",
          "cooldown": "0",
          "sell": "SELLPRICE"
        },

If we could add a 6th option, "perm": "CUSTOMOXIDEPERMISSION", and make it so that players are required to hold that perm in order to purchase that item, we could set the required perm for a second item to be the perm that the first item gives. Then we can set a few commands which when the second item is "Purchased" it revokes that perm and deposits the desired amount into the players account, thereby allowing players to sell back their perms, but also checking to see if the player has the perm to begin with.

This also has a few secondary benefits:
-The ability to grant VIP players and Admins access to the ability to purchase exclusive items
-Players who have earned achievements from plugins like PlayerChallenges, can be given access to exclusive items
-Players who have completed quests can be given access to exclusive items

Thank you so much for reading and responding!
-BXRFlip

I'll add something of this sort on to my to-do list after I get the cooldowns all settled.

I like the idea, thanks for the suggestion!

I stumbled around the code a bit and was able to get it to work! I can add perms to each item and if a perm is not set it still allows the purchase. I can send you what I did if you want.

Please do!
I'll make the changes right away.

Sorry guys, I was out of town for a while, Here's what I did:

Moderator edit: Please do not post random plugin versions in forum posts.