4 months old price, quite a forgotten hat...

Sellers

http://backpack.tf/classifieds/search/346/6/0 - 1 at 1.44 (7 days) and 1 at 1.55 (2 days)

< 1.33

http://www.tf2outpost.com/trade/12993789 - 1.22, 14 hours

1.33

1.44

1.55

http://www.tf2outpost.com/trade/12699121 - 1 week

http://www.tf2outpost.com/trade/12776372 - 1 week

http://www.tf2outpost.com/trade/12988427 - 18 hours

http://www.tf2outpost.com/trade/13003410 - 8 hours

http://www.tf2outpost.com/trade/12549302 - 1 week

http://www.tf2outpost.com/trade/12390018 - 2 weeks

http://www.tf2outpost.com/trade/12555397 - 1 week

Sold

http://www.tf2outpost.com/trade/13003318 - 1.22

http://trade.tf/listings/search/Sell/Unique/The%20Superfan/None/1 - Proof it was 1.22

http://www.tf2outpost.com/trade/13001722 - 1.33

http://www.tf2outpost.com/trade/12996968 - 1.33

http://www.tf2outpost.com/trade/12995208 - 1.33

http://tf2tp.com/trade.php?trade=9647586 - 1.33

Conclusion

Solds at 1.33, unsolds at 1.55 (for extended periods of time), no sellers or solds at 1.44 to prove 1.33-1.44 and no solds at 1.55. Vote accordingly.

Help / Consturctive Criticisim / Additional Proof / Counter-Proof is ALWAYS welcome! :D