oops, wrong currency...

1 of 2 in existence!

Sale 1:

Sold for Poisoned Shadows Helmet Without a Home* = 34.5 (rounding to 35 keys)

http://www.tf2outpost.com/trade/28031970 | http://www.tf2outpost.com/trade/27991761

http://backpack.tf/profiles/76561198031350787/#!/compare/1459641600/1459728000

Sale 2:

Sold for Roboactive Tungsten Toque* = ~37 keys

http://www.tf2outpost.com/trade/28041574 | http://www.tf2outpost.com/trade/28028801

http://backpack.tf/profiles/76561198055211132/#!/compare/1459814400/1459900800

Mini-suggestion for Poisoned Shadows Helmet Without a Home*:

http://backpack.tf/vote/id/570b9dfac440457344701a17

Mini-suggestion for Roboactive Tungsten Toque*:

Sold for Anti-Freeze Tungsten Toque** = ~37 keys (see below)

Mini-mini-suggestion for Anti-Freeze Tungsten Toque**:

Sold for 40 keys

http://www.tf2outpost.com/trade/27741723

http://backpack.tf/profiles/76561198059340042/#!/compare/1454313600/1454400000

http://www.tf2outpost.com/trade/28057889 - B/O of 34 keys (young)

~ Taking a value of 34-40 keys.

Conclusion:

Two valid sales at 35 and 37 keys. Taking a final range of 35-37 keys.

Feel free to support/counter my suggestion!