Is the work of a commercial brokerage company considered permissible, given that it sometimes sells goods at a price it determines itself, and at other times it agrees with factories on a commission from them, and it takes a commission from the buyer added to the approved price, and sometimes the buyer does not know that the company takes a commission from the factory, and the company bears all the risks of warranty and losses resulting from its dealings?

Commercial intermediation is permissible if it adheres to the Sharia guidelines, which include the condition that the subject of intermediation must be permissible according to Sharia, and that the broker's fee and the work being brokered are known, without the need to inquire into every detail of the subject of intermediation.

Regarding the issues inquired about:

1. It is not permissible for the broker to price the commodity for the buyer. Rather, the broker should present the seller's price and mediate in the agreement without deception, as the broker is a trustee for both parties.

2. It is permissible for the broker to take a commission from both parties, unless the broker is an agent for one of them. In that case, it is not permissible for the broker to take a commission from the other party except with the permission of the principal.

3. If the broker commits to guaranteeing the subject of intermediation upon the appearance of a defect or a rightful claim, this guarantee becomes binding on the broker. The buyer can then claim against the broker, and the broker can claim against the one who deceived him.