Is it considered cheating for a buyer if a real estate agent sells a property for a price higher than what the original seller requested (120 Riyals instead of 100 Riyals), with the seller's knowledge that the increase is for the agent in addition to his commission? And what is the ruling if the agent tells the buyer that he does not want a commission from him, while he is benefiting from an amount larger than the usual commission?

Whether the seller says to the broker: "Sell this property for such-and-such a price, and whatever is in excess is yours," or the broker says: "I will sell this for such-and-such a price, and whatever is in excess is mine," and the seller agrees to that; then the excess belongs to the broker, in addition to the brokerage fee that he stipulated and the seller agreed to. The broker selling the property at a higher price is not considered deception of the buyer, provided he does not lie or mislead him. The broker may take his fee from the buyer, or be content with the excess he obtains from the sale.