The ruling on dealing in car showrooms in the presence of Najash

The Shaykh:
May Allah greet you and bless you.

The questioner:
Honorable Shaykh, this questioner, Abu Abdullah, says: I work in the morning in a job, and after the 'Asr prayer I go to the showrooms to earn a living. I have seen among those who sell and buy cars matters that are not good in their selling and buying of cars, and among them is Najash. Is it permissible for me to deal in such sales in car showrooms and elsewhere?

The Shaykh:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon our Prophet Muhammad, and upon his family and all his Companions. As for what follows, selling and buying cars and other things must be based on truthfulness, trustworthiness, and the absence of deception. The Prophet (peace and blessings be upon him) said: Najash is when a person who has no intention of buying increases the price of a commodity, and he only increases it to raise it for the others who want to buy it. This is forbidden; the Messenger (peace and blessings be upon him) prohibited it in his saying, "Do not engage in Najash," because of the consumption of people's wealth by falsehood, and because of the betrayal, deception, and fraud involved in it, and so on. So this dealing that is based on Najash and lying is forbidden dealing.
Allah the Exalted said: And the Prophet (peace and blessings be upon him) described the merchants as being the wicked on the Day of Resurrection, except for those who feared Allah, did good, and told the truth. Therefore, it is obligatory for the one who buys and sells cars and other things to adhere to truthfulness and trustworthiness, and not to cheat, deceive, or scheme against his brothers, for their wealth is forbidden to him. The wealth of a Muslim is not lawful except by his own willing consent, and every Muslim is forbidden to another Muslim in his blood, his wealth, and his honor. It is not permissible to take anything from his wealth except either by his own willing consent as a gift, donation, or voluntary act, or through a valid and truthful transaction. Allah the Exalted said: between you by falsehood, . It is obligatory for the Muslim to fear Allah, and if you become aware of any of these matters, it is upon you to advise them and warn them of Allah, and not to participate with them in these forbidden transactions. Whoever fears Allah, He will make a way out for him and provide for him from where he does not expect. Yes.