The ruling on an agent selling for less than the price set by the principal

The Shaykh : Yes, that is the end.

The questioner : If he sets a lower limit, saying, “Sell it for between so much and so much,” and he sells it at the lowest price in that range,

The Shaykh : If he says, “Sell it for between ten and twenty,” and he sells it for fifteen or ten, that is not acceptable. No, if he sells it for fifteen, he does not take the excess. But the question is: is it permissible to sell it for less than the estimated amount, considering that the value might rise? That is the question. No, it is never permissible. If he says, “Sell it for between ten and twenty,” and he sells it for fifteen, it is not permissible except for five, because the increase belongs to the money. But if he says, “Between ten and twenty,” and he knows that if he repeated the request for an increase, it would rise to twenty, then it is not permissible for him to sell it for fifteen.