Both rings were found in the vicinity of the city of Orel. Since the rings allegedly belonged to the same soldier, then sold in one lot. Skull ring has the stamp - silver 835 sample
— 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