Proof below. 5 month-old price.

Clean only

Sales:

http://www.tf2outpost.com/trade/17095932

-wanted 11 buds

-sold for ge phantom+6 buds

-seller's bp:

http://backpack.tf/profiles/76561198033391841?time=1389859200

http://backpack.tf/profiles/76561198033391841?time=1390032000

-~11 buds due to b/o

http://www.tf2outpost.com/trade/17876875

-wanted 10 buds

-phantom+pe wet works (unpriced) bought pe ck: http://www.tf2outpost.com/trade/18003663

http://www.tf2outpost.com/trade/17557830

-sold for 9 buds

http://www.tf2outpost.com/trade/18198968

-wanted 10 buds

-seems to have sold for duped burning tossle: http://www.tf2outpost.com/trade/18469079

-~9 buds

-------------------------------

-duped burning tossles:

http://www.tf2outpost.com/trade/17862421

-sold for 10 buds

-seller's bp:

http://backpack.tf/profiles/76561197989136498?time=1392364800

http://backpack.tf/profiles/76561197989136498?time=1392451200

http://www.tf2outpost.com/trade/16536224

-b/o of 12 buds

-sold for clean ge tossle (outdated)+2 buds+sf knife+white bills: http://www.tf2outpost.com/trade/16872677

-~9.7 buds

http://www.tf2outpost.com/trade/16491803

-bought his for 10 buds

http://www.tf2outpost.com/trade/18649756

-looks to have quicksold for 9 buds

So safely around 10 buds

--------------------------------

Current trades:

http://www.tf2outpost.com/trade/17921094

-wants 10 buds pure only, 1 month old

-notable offers:

8 buds rejected

http://www.tf2outpost.com/trade/17371068

-in a set

http://www.tf2outpost.com/trade/18480772

-only wants csgo knives

http://www.tf2outpost.com/trade/18419842

-wants 10 buds, only pure

http://www.tf2outpost.com/trade/18655734

-wants 11 buds

Sales: 9, 9, 11

Initially I would have put 11 as high end but looking at these trades it doesn't look possible, so I'm lowering it to 10 flat looking at the b/os. 9 as low end is obvious.