No I mean let's say I sell a stack of 64 cobblestone for 1 Billion. Obviously no one will purchase that listing.
So by default, all items on the store should have a 30 expiry timer. If the item is not sold within 30 days, it will be returned to the player in a "/collect" item panel.
This idea is meant to remove inactive listings which are sitting there longer than 30 days. For example /shop has a person seller 2 shulker shells for 10,000,000. It's been there for months. This idea will remove such items from the shop and return them to the player who listed it originally for relistin