The ruling on returning a commodity to the seller when it is in the possession of the buyer

Question:
May Allah inform you, what is the ruling if my brother or colleague wants to buy something that I have? I told him to return this commodity to the seller. Is that permissible? This is the same question I have. So the ruling is: if my brother or colleague wants to buy something that I have, and I tell him to return the commodity to the dealer, is that permissible?

Answer:
If he has already made an offer for the commodity, it is not permissible for you to tell him to return it because you have something better. That is selling on top of your brother's sale. However, as long as he has not made an offer, and he says, "I would like to buy a book" or "I would like to buy a car," and he has not yet purchased it, you may tell him, "I have something that does not conflict with this. It has not been purchased by anyone, and I am not committed to anyone." You may tell him, "What you are looking for is with me." This saves him the trouble and saves him from conflict. But if he has become committed to a person who has made an offer for it, it is not permissible for you to say, "Leave it and I will give you something better." Yes.