Is it permissible to buy and sell in the Imam's room in the mosque?

The Imam's private room is governed by the rules of a house, not a mosque, because the rooms of the Mothers of the Believers and the homes of the Companions were adjacent to the mosque, and they carried out ordinary activities in them, and they experienced janabah (ritual impurity requiring ghusl) and menstruation. Therefore, buying and selling and engaging in permissible activities are allowed in it, while avoiding anything that disrespects the sanctity of the mosque, and ensuring it does not become a permanent place for selling and striking deals.