The ruling on purchasing an item not present in the store

Question:
The questioner says: Shaykh, if I ask the owner of a store for an item and he does not have it, but he immediately goes and brings it from a neighboring store, and he adds to its price without informing me, is that permissible for him?

Answer:
If no sale contract was concluded before he went and brought it, there is no harm in that; so buy it from him if he brings it. But if a sale contract was concluded, meaning you contracted the sale, and then he went, bought it, and brought it, this is not permissible; because he sold what he does not own. So this contract is invalid and not valid, as long as the item is not in his ownership, and he only goes to buy it after the sale. This is not valid. Yes.