Updating this 2 month old price.

Currently only 4 different hats in tf2outpost.

http://www.tf2outpost.com/trade/9400484

B/O: 1 bud, 14 keys.

Offers:

1 bud (3 weeks ago, when they were worth 23-24 keys)

http://www.tf2outpost.com/trade/10052506

B/O: None set

Offers:

1 bud (retracted?)

Strange Festive Knife (22-23 keys, declined)

http://www.tf2outpost.com/trade/7799586

B/O: 1.5 buds

Bubbling Sergeant's Drill Hat (1.1 - 1.3 buds, retracted?)

level 200 carbonado knife+ strange sapper + strange huntsman+ BMOC (~21-22 keys)

http://www.tf2outpost.com/trade/10410993

B/O: ~30 keys, rarely bumped, no offers.

Latest confirm-able sale occurred at the time of the last suggestion.

Now to explain the values chosen. Lower value set at 22 due to several offers reaching this range. Higher value at 25 as this is a feasible value for getting one of these hats.

If you disagree with the range, have more proof that I have missed, or any other way to help this suggestion, comment below. All additional help will be greatly appreciated. Thanks for reading, and enjoy your day!