Is it permissible for an employee to sell or repair equipment for his government department at a price lower than the market rate and profit from a commission or brokerage fee?

The committee acts as an agent for the governmental department in selling and repairing equipment, and each member of it is an agent. The act of an agent selling to himself or repairing by himself to receive a special fee is a matter over which scholars have differed regarding its permissibility. The preponderant opinion is permissibility, provided the principal gives permission, especially if the price has been specified for him. So, if the governmental department permits any member to do so, there is no objection; otherwise, it is not permissible.