Is it permissible for an employee to furnish their government department with devices at market price?

If you are authorized by your workplace to equip a government department with devices, you must investigate the best price and quality. You are not permitted to choose a higher price or lower quality specifications if better options are available. However, if the devices belong to you and you wish to sell them to the government entity as the supply officer, this is not permissible without the permission of your workplace, because an agent buying from himself is forbidden due to the accusation of self-favoritism.