The item ID for Amulet of Zenithar in Skyrim on Steam (PC / Mac) is:
To spawn this item in-game, open the console and type the following command:
player.AddItem 000878BB 1
To place this item in-front of your character, use the following console command:
The Amulet of Zenithar in Skyrim is perhaps one of the most desirable items - when worn, its effect provides a 10% improvement in all prices in shops, etc. Many creatures and characters drop the amulet as loot, it can also be found under the shrine in the ruined fort (near Gjukar's Monument). Price improvements from this item stack with effects from other items (for example the Volsung).