Shop. Removal or prohibition of purchase

[g1ps]

How to delete an item in the store after purchase or prohibit its purchase ?

Thanks in advance !

Spoiler: skript

command /Rank:
    trigger:
        open chest with 1 rows named "&a&lРанги" to player
        format gui slot 0 of player with paper named "test1" with lore "1000"
        format gui slot 1 of player with paper named "test2" with lore "2000"
        format gui slot 2 of player with paper named "test3" with lore "3000"

on inventory click:
    if event-item is paper named "test1" with lore "1000":
        cancel event
        if player's balance > 999:
            remove 1000 from player's balance
            execute console command "/giverank test1"
        if player's balance < 999:
            send "&6no money" to player
            cancel event
on inventory click:
    if event-item is paper named "test2" with lore "2000":
        cancel event
        if player's balance > 1999:
            remove 2000 from player's balance
            execute console command "/giverank test2"
        if player's balance < 1999:
            send "&6no money" to player
            cancel event
on inventory click:
    if event-item is paper named "test3" with lore "3000":
        cancel event
        if player's balance > 2999:
            remove 1000 from player's balance
            execute console command "/giverank test3"
        if player's balance < 2999:
            send "&6no money" to player
            cancel event

 

[Deleted member 9590]

You can set the event-slot to be air.
Also, I recommend using vanilla guis.
See this amazing tutorial on skript vanilla guis https://forums.skunity.com/threads/vanilla-guis.8939/