Sorry for last suggestion, here is a better one

Sold for a Death at Dusk Das Hasmattenhatten ( To Me )

Mini for Das Hasmattenhatten can be found here - http://backpack.tf/vote/id/555e8f61dea9e90e0f8b4587

Proof of Purchase - ( Of Screamign Eagle )

http://www.tf2outpost.com/trade/25966991#latest

http://www.tf2outpost.com/trade/25938621#latest

80-100 = Lets just call it 100

Also sold for an Ooze Towering Pillar of Hats ( From Me )

Mini for Ooze Pillar can be found here - ( From Me )

Sold for D@D Chiefan's Challenge = 72.5 ( 70-75 )

Proof of Purchase - ( Of Chieftan's )

http://www.tf2outpost.com/trade/25989832#latest

http://www.tf2outpost.com/trade/25968846#latest

Proof of purchase - ( Of Ooze )

http://www.tf2outpost.com/trade/25966991

http://www.tf2outpost.com/trade/25968846#latest

72.5 Keys

72.5 - 100 Keys = ~86.25

86.25 * 0.9 = ~78

Frostbite Screaming Eagle = 78 Keys

Just check the item histories in teh item in each trade and it matches up with the sales

if you have anything to tell me please do so, I am learning how to price items.