The Ruling on Najash in Sales

Question:
The Shaykh (may Allah have mercy on him) said: Once, in a market, a man who wanted to sell his car brought his companions to raise the price. They did not want to buy it except to raise the price so that the car would sell. What is the ruling on this? What is the name of this sale? Is it two sales in one sale?

Answer:
This is not permissible. The Messenger of Allah (peace and blessings be upon him) forbade it. He forbade Najsh (bidding up the price) and said, "Do not bid up the price." Najsh is when a person increases the price of a commodity when he does not want to buy it, but only wants to raise the value for the customers. This is forbidden (haram). The Messenger of Allah (peace and blessings be upon him) forbade it and said, "Do not bid up the price." Najsh is when a person increases the price of a commodity when he does not want to buy it, but only wants to deceive the customers and raise the value for them.
If the one bidding up the price is a partner in the commodity, the sin is greater. This is because some partners negotiate the price of the commodity while they are partners in it, and the buyer does not know, and the customers do not know. This is more strictly forbidden because it is deception of the people, and because it is consuming wealth unjustly. Therefore, this is not permissible. All Najsh is forbidden (haram). The increase is only permissible for the one who wants to buy. Yes.