The helmet was found in German combat positions in the North of Stalingrad, in the field. The place where the helmet was found is now called the village Latoshinka.
— 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