Since the Royal Mail postal rate changes of 31st March 2014, the cost for sending an item by 2nd class post through the franking process is just 37p.Compare that to the normal price of 53p when using an ordinary stamp and you can see a 30% reduction in cost.ince the Royal Mail postal rate changes of 31st March 2014, the cost for sending an item by 2nd class post through the franking process is just 37p.