Every seems to think this effect is god tier...

SALES;

http://www.tf2outpost.com/trade/24926295 Sold for;

http://www.tf2outpost.com/item/440,3504590348,162,6 Clean Max (3.3)

http://www.tf2outpost.com/item/440,3504590557,664,11 SF Sniper (~1.5)

http://www.tf2outpost.com/item/440,3504590532,30081,5 KaW Tsarboosh (Outdated at 1.2, http://www.tf2outpost.com/trade/24966642 sellers sold with B/O of 1 so taking 1)

5 keys pure (~0.4)

(2.5 * 0.9) + 3.7 = 5.95 (rounding to 6)

Histories:

http://www.tf2outpost.com/item/440,3547609612,30406,5

http://www.tf2outpost.com/trade/24426982 Sold for Stormy Neckwear (Outdated at 8.55, mini at 7)

7 * 0.9 = 6.3)

Histories:

http://www.tf2outpost.com/item/440,3547609612,30406,5

http://www.tf2outpost.com/item/440,3495613342,30307,5

Neckwear mini:

http://www.tf2outpost.com/trade/25012400 Sold + AF Counterfeit (~2.65) + Aussie SMG (~0.85) for Miami Pullover (10.6)

Presuming offered, 10.6 - (2.65 + 0.85) = 7.1 (rounding to 7)

http://www.tf2outpost.com/trade/24912077 Seller in peacenik trade had b/o of 7

Using 7.

Let it ride.