The helmet was found during excavations in 2015 in the steppe North of the village Marinovka (Stalingrad region). The helmet was signed by the owner, but the signature almost did not saved
— 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