5 months old, lots of dupes of this hat.

http://www.tf2outpost.com/trade/17725641

Beams Fed + vivid phantom + 1 bud for Jefe

http://backpack.tf/id/76561198008795422?time=1391846400

http://backpack.tf/id/76561198008795422?time=1391932800

Price: 0.9*(7.2 + 4.7) + 1 = ~11.7 buds

Other semi-useful sales:

http://www.tf2outpost.com/trade/18005843

Offered + Scorching Anger for TF Noh + hearts mullet + peace phantom

So, ~27 + 1.5 + 2.5 - 21 = ~10 buds

(all older prices, but are reasonable and conservative given current asking prices)

http://www.tf2outpost.com/trade/18323377

Sold for Burning Lid (old price = ~10.5 buds)

http://www.tf2outpost.com/trade/17057858 (dupe)

G.E Anger + P.E Capo's + KaW Full Metal Drills

Anger OG price: ~7.2, but current B/Os are 6.8-7

Capos OG: ~2 buds, none on OP atm.

Drills is ~5 buds, but was priced 3 months ago. Lowest B/Os are 3-4 buds now

Price = ~10 buds assuming 6.5 + 1.5 + 3

http://www.tf2outpost.com/trade/16852922 (dupe)

Added a bud and 9 keys for a ge reg and ghosts tossle

Old price on Reg = 5.3-6, current B/Os are 6 buds

Tossle is 5.4

So price would be roughly 9.5 buds

http://www.tf2outpost.com/trade/16852036 (dupe)

Sold for 8.5 pure in like 10 minutes

http://www.tf2outpost.com/trade/17347643 (dupe)

Sold for harvest juju + collecter killstreak ushanshah

Juju old price is ~9 buds, Current B/Os are mostly 10, but this hat is horrible to sell so the range can vary greatly on it.

http://www.tf2outpost.com/trade/18138475

Appears to have added 13 keys for a duped DBD jefe

http://www.tf2outpost.com/trade/17749834

Sold for a deal on a RA dragonborn (uninvestigated since it's unpriced)

http://www.tf2outpost.com/trade/17872815

Sold for DBD Brown Bomber

Yeah, so this one was kind of rough to do, but the one solid sale indicates it's about 12. Duped ones are getting 9-10 in value so it makes sense the much more rare clean ones would get more.