The helmet was found among iron debris and iron sheets at great depth in the field. The helmet was found South of the village of Novaya Nadegda (Stalingrad region)
— 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