Helmet M40 was belonged to soldier of Estonian battalion of 5th SS Panzer Division Wiking and was found during diggings in kharkov region of Ukraine. Helmet size - 66
— 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