Pfff. This can be easily sold for 1.66. People just don't want to have more profit.

Buyer

http://www.tf2outpost.com/trade/20712936 - 1.33 (no luck)

Sold for 1.44

http://www.tf2outpost.com/trade/20545735

http://www.tf2outpost.com/trade/20885361

Sold for 1.66

http://imgur.com/mff9upW

Sold for 2.00

http://www.tf2outpost.com/trade/20898906

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.