Current price is 2-2.6 and hasn't been checked in 7 months. Three on the market at Outpost, one on Bazaar. None have offers except for one on Outpost that's been there for a while with a bunch of rejected offers. Better offers are listed below. Most "good" offers are right in the range, but a couple stand out on the high end with the highest being 3.4-4 in value.

Bumping a half bud or more up is too much for sure as the high end offers could be mistaken overpays, but the range could probably use a slight bump up especially at the low end because offers in the range are not successful. To the proof (such as it is with only one trade having any offers...)!

http://www.tf2outpost.com/trade/7149186

Orb Fire slug (1.9-2.2) + BMOC (call it a generous 14 keys) = 2.4-2.7

Smoking Glen Bonnet (23-31 keys) + Smoking Capotain (20-26 keys) + 1 bud + 4 keys = 2.7-3.2

2012 Strange Festive Set = call it 2.7

Eerie Orb Fire Bonk (2-2.5) + sweets

Stormy Attendant (2-2.6)Smoky Slug (1.2-1.6) + Stormy Rag (1.2-1.4) + 1 bud = 3.4-4

Additional copy pasted proof researched up by Awesome McCoolname and posted on an alternative suggestion:

http://www.tf2outpost.com/trade/7149186

--offered lvl 1 max+1 bud (2.8)

--steaming waxy+13 keys (2)

--bubbling slug +4 keys (2)

--stormy salty (2.7)

--max (2)

--erie hoodie (3)

--nb juju (2.1)

--nb stahl+p fetti aa (2.1)

--2 buds

--OF slug+crate 40+sweets (2.2)

--searing swag (2.3)

--smoking slug+stormy rag+1 bud (3.5)

http://www.tf2outpost.com/user/82760

--appears that you paid a max.

http://www.tf2outpost.com/trade/5367583

--Sold for 3 buds, 3 months ago. (hasn't had any offers above 2.8 since).