What is the upper limit for the seller's profit?

The questioner : What is the upper limit on the profit a seller takes? Sometimes certain goods are not available, for example in the town where he sells them. Suppose he buys it for one hundred, and even if he said five hundred, he would buy it for one hundred. What is the limit he can take without it being forbidden (haram) for him?

The Shaykh : It is obligatory to look at the value of these goods in the market.

The questioner : What is in Sushi.

The Shaykh : In the neighboring town, he knows; the merchants know it.

The questioner : But sometimes it is a rare item, for example from Khalid, for example from a country.

The Shaykh : And I see that this is of the kind of hoarding. If the item is not found except with him, he sells it at the profit that is customary and does not hoard. But the problem is that some sellers say, if we set the price low, the buyer says it is not good and leaves it. This is common; they say it is common in women's clothing.
If a woman says, for example, "This is twenty riyals, and this is its value, and the seller's profit," and she says, "No, it is not good, leave it," she goes to the second shop, and he says, "This is two hundred," and she says, "This is the good one," yes, and she took it. This is a reality. Now they tell me that they buy from neighboring countries, such as Riyadh, for example. They buy these clothes, this garment for twenty or thirty riyals, and then they bring it here to al-Qasim and sell it for eighty riyals. And they say, "We are afraid that if we say forty, we will only make a profit of ten." The woman says, "This is not good, leave it." This is a problem, this is a problem. So we tell them: Fear Allah ,