I requested a commodity from the shop owner, so he brought it from the neighboring shop and sold it to me. What is the ruling on this sale?

Question:
May Allah reward you. This questioner also says: Honorable Shaykh, if I request a commodity from a shop owner and he does not have it, but he immediately goes and brings it from a neighboring shop and adds to its price, which is what it is sold for, without informing me of this, is that permissible?

Answer:
It is not permissible for him to increase the price beyond the actual market price. In fact, he is concealing this from you and deceiving you, because this is its value and it is not so. Whoever deceives us is not one of us. The Messenger (peace and blessings be upon him) said: The two sellers have the option of canceling the sale as long as they have not separated. .
The transactions of Muslims are based on clarity, advice, and the absence of deception. Also, beware of buying a commodity that is not in the possession of the seller; he goes and then buys it. You conclude a sale with him for a commodity, then he goes and buys it for you. This is not permissible.
Hakim ibn Hizam (may Allah be pleased with him) came to the Messenger of Allah (peace and blessings be upon him) and asked him, saying: O Messenger of Allah, a man asks me to sell him something I do not have, so I go and buy it from the market. He said (peace and blessings be upon him): Yes.