Looking at the medium price of some hats on trade.tf makes me want to kill myself when I am making those suggestions.

Sold for 1.44

http://www.tf2outpost.com/trade/21066584

Sold for 1.55

http://imgur.com/xfC21Lw

Sold for 1.66

http://www.tf2outpost.com/trade/21053238

http://imgur.com/RSkRQ6M

Conclusion: Before you say something stupid like "Not enough proof, downvote", take a look on the market first. This thing is so rare now. Demand > Supply because supply of craft hats went down and it's reasonable for this thing to rise.

Feel free to counter / support my proofs.