Ruling on selling goods for more than the set price

The questioner:
Honorable Shaykh, may Allah grant you success. This questioner says: What is the ruling on selling goods for more than the set price?

The Shaykh:
No, if the price is set, he sells it at the set price. Yes.

The questioner:
Honorable Shaykh, may Allah grant you success. This questioner says: A man bought a new car, then recited al-Fatihah and the mu'awwidhat over it, and over a bottle of water. He says he then sprinkled the water on the car because it was new. Is his action prescribed?

The Shaykh:
Unless the question returns to us if he sells it for more.

The questioner:
He says: Is it permissible for a person to sell for more than the set price?

The Shaykh:
Yes, it is permissible. The Messenger (peace and blessings be upon him) gave a man a dirham to buy a sacrifice for him. The man bought two sheep for one dirham and came to the Messenger (peace and blessings be upon him) with one sheep and one dirham. The Messenger (peace and blessings be upon him) said to him: So he never bought anything but he profited from it by the supplication of the Messenger (peace and blessings be upon him).