15 isn't valid anymore, counter.

Sold for a Terror-Watt Surgeon's Stahlhelm(21.5 Keys)(B/O was 20)

http://backpack.tf/profiles/76561197991208302/#!/compare/1454140800/1454227200

http://www.tf2outpost.com/trade/27781572

Terror-Watt Surgeon's Stahlhelm mini suggestion

Sold for $50 SCM(~20-23 Keys)(Credits to Marty Birdman for the sale!)

http://i.imgur.com/FAxy5PA.png

Using 20-23.

Only useable sale I could find, 20 Keys should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.