First suggestion for this hat.

How could it be 1.33 at the first place anyway?

Selling for 1.33

http://www.tf2outpost.com/trade/20874399

http://www.tf2outpost.com/trade/20870707

Sold for 1.66

http://www.tf2outpost.com/trade/20395742 (Has just sold 2 days ago)

http://www.tf2outpost.com/trade/20643899

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.