With that we can lock specific items so we don’t accidentally sell something that we want, for example escape rope has almost the same name with escape orb and it can easily get mixed up and get sold.
or
we can make a custom bag that can be obtained through endgame that allows 1 to 3 items at max but still take space in the normal bag and counts as 3 or 1 (depends on how many items are in the bag) stuff that are in the bag cannot be sold and will not show up or it can be grayed out so it indicates that it is locked and cant be sold