Price last updated 6 months back.

I sold mine for Clean Max level 82(2-2.2 Buds) with adding 5 keys

http://www.tf2outpost.com/trade/13415085

[sold today]

Got offered smoking noble(1.6-1.8 buds) + 12 keys (~2.1) and

Got offered orb fire noble (1.8-2.1 buds)

http://www.tf2outpost.com/trade/12601283

[both offers 1 week ago]

Not much seen for sale since it is rare. May be this is reason its price did not update since sales are less.

Considering above proof the hat price should be updated to 1.8 to 2