Collector's Officer's Ushanka
This item was last sold for 32 Keys, a Strange Australium Rocket Launcher and 756.70 USD with PayPal, which was around 550 keys in total at the time.
It is the only one known in existence.
Collector's Officer's Ushanka
Team Fortress 2 Level 38 Hat
Paint Color: A Distinctive Lack of Hue
This hat was made of bear hands.
That bear was killed with bare hands.