The helmet was found near Leningrad in the place of Sinyavino, according to the events of Operation Iskra. Helmet from the collection of a digger, was found in 2017.
— 10 USD by Russian Post
— 25-40 USD by courier service EMS
— 30-40 USD by Russian Post
— 40-60 USD (depends on customer's country) by courier service EMS
What is the difference between Russian Post and EMS courier service? Read here - link