What is the ruling on selling a house where the buyer agreed with the broker on a price of (380,0), while the seller did not ask for more than (370,0) and the sale was concluded on this basis; does the broker have the right to demand the difference of (10,0) from the buyer?

If the broker and the buyer agree on a specific fee for showing the house, the buyer must pay the agreed-upon fee. However, if no specific fee was agreed upon, and custom dictates that there is a fee for the broker, then the buyer must pay the customary market rate, which is to be estimated by experts in the field.