Offering goods at a lower price to a buyer who has been negotiating with another party

Question:
The issue of the Shaykh (may Allah preserve you). A person takes a certain item from a supplier at a specific price, so another person offers him the same item at a lower price, knowing that the first person is buying that item for more than the price he offered. So what is the ruling?

Answer:
There is a distinction here. If the buyer has negotiated with the shop owner and intended to buy from him, and then someone comes and says, "Do not buy from him; I will sell it to you cheaper," this is selling over the sale of his brother, which is not permissible. However, if the buyer has not yet negotiated and is just going around, visiting the traders or the shops, looking for the lowest price, then there is no harm in saying, "Come, I have it cheaper than what is in the market." This does not contradict the ruling because no promise has been made and no sale has been completed, so this is not selling over the sale of his brother. Rather, this is part of the practice of competitive bidding. The result is that if negotiation has taken place between him and the shop owner, and all that remains is the delivery, and then someone says, "I will sell it to you cheaper," this is selling over the sale of his brother, which is not permissible. But if nothing has been finalized, and the buyer is still looking for the lowest price, so the bargaining is open, then there is no harm. Yes.