Helmet was found on the Western outskirts of the city of Stalingrad (now Volgograd) in 2016 in the trenches. This place is called "Gornaya Polyana". Near the trench were found the shells from the Oerlikon 20 mm cannon
— 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