I COULD NOT find any sales. Literally. I checked the history of all nuts big chiefs and the previous owners hadn't had trades up for about 5 months or so. Since 11 to 12 (a reasonable price) failed, lets try 12 keys.

http://www.tf2outpost.com/trade/15120609

Tried to sell it for 12 to 14 keys for 3 weeks with no offers besides one very low lowball. I sold it today to nero for 12 keys pure.

I bought this hat for 10 keys some weeks back as a quicksell.

http://www.tf2outpost.com/trade/13362003

Best offer in two months of constant bumping is 12 keys

http://www.tf2outpost.com/trade/15170818

BO at 12 keys for 3 weeks not met