Ruling on selling goods at a single price to everyone

Question:
He says: Some buyers do not bargain in buying and selling. So what if we sell to those people at a price different from the price for those who bargain?

Answer:
It is obligatory to sell at a single price if that is the known custom, and one must not take advantage of the ignorance of the ignorant or the heedlessness of the heedless. However, if the price is set for a single item on display, but it is lowered for a specific person out of love for him, or friendship with him, or because of his poverty, or something similar, and the money is his own, then he may be lenient with some people, otherwise the price is known. So the price for the general public is ten, but he may be lenient with some friends or some poor people and sell to them for nine or eight; there is nothing wrong with that.
As for taking advantage of the ignorant and the inattentive by selling an item that costs ten for twelve, thirteen, or more because they do not bargain; this is not permissible. It is obligatory for him to sell at the price at which he sells to the people. Yes.

The presenter: May Allah reward you with good.