So yea I'm going to set a price for this even though I sold it 2 weeks ago

http://www.tf2outpost.com/trade/11599279

I bought it for an Anti freeze mullet (3.8) + a Stormy 13th hard counter (5) + a steaming ketche (12 keys) + 16 keys = 9.1 with overpay

Proof:

My inventory before buying it (it doesnt show the steaming ketche since I sold it and bought it too fast but I bought it for 8 keys on a qs):

http://backpack.tf/id/76561198073419605?time=1370761200

My inventory after buying it

http://backpack.tf/id/76561198073419605?time=1371106800

I sold it for 5 buds, 15 keys, a filamental (1 key), a memory leak nappers (2) + a phosphorous bubble pipe (2.5) = 9.5 with overpay

http://www.tf2outpost.com/trade/11645590

Offers I have got:

Gifted V. BK (9ish) + 2 buds in keys = 10.5

Non gifted v. BK = 10

Moon lucky shot + 1 bud = 9.5

Secret Pot + 3 buds = 10.5

Another one sold in the past:

http://www.tf2outpost.com/trade/11716335

Sold for : strange festive rocket launcher (2) + strange festive scattergun (2.7) + strange festive bat (1) + strange festive sniper rifle (1) + strange festive minigun (1) + orbiting planets desert marauder (1) + burning industrial festivizer (2.8) + s.f. sticky bomb (1) and s.gunslinger (1.2) = 12.33 buds with overpay

Offers he got:

Nappers Memory Leak + clean 1 of 1 Plumber's Pipe Phosphorus + 4 buds (8)

Anti-Freeze waxy (9.5)