The helmet was found during digging in Gorodische district, the area North of the city of Stalingrad (now Volgograd). Beside the helmet were found a lot of metal fragments. Size - 64
— 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