Is it permissible for a Muslim to buy land or a commodity (such as real estate or a car) without informing the seller of a potential increase in its value, and what are the rights and obligations of the seller and buyer in this case?

It is permissible for a person to buy land knowing that its value will increase, and it is better to inform its owner of this.

However, if he knows that the land contains valuable minerals such as petroleum or gold, he is not permitted to own it because it is a public wealth belonging to the Muslims. Personal benefit from it is contingent upon the Imam's permission, as it closes the door to discord and chaos among people, and because these minerals have become a cornerstone of the global economy and are essential for the advancement of Islamic nations.