It's not showing up yet, but I DO own one :P

SALES:

http://www.tf2outpost.com/trade/20619049 Sold for Duped (?) Scorching Bat Powdered (Unpriced, mini at 4.2) + TF Logo Western (1.2)

5.4 * 0.9 = 4.86 (rounding to 4.9)

Histories:

http://www.tf2outpost.com/item/440,2757021798,30136,5

http://www.tf2outpost.com/item/440,2729800782,30069,5

http://www.tf2outpost.com/item/440,2729800761,379,5

http://www.tf2outpost.com/trade/20959553 Sold for TW Powdered (2.3) + Steaming VRH (20 keys, = 1.1 buds) + DP HeadLamp (Unpriced, mini at 0.9)

4.3 * 0.9 = 3.87 (rounding to 3.9)

Histories:

http://www.tf2outpost.com/item/440,2757021798,30136,5

http://www.tf2outpost.com/item/440,2667740818,30069,5

http://www.tf2outpost.com/item/440,2757021798,30136,5

http://www.tf2outpost.com/item/440,2691161223,30041,5

HeadLamp Mini:

http://www.tf2outpost.com/item/440,2691161223,30041,5 -> http://www.tf2outpost.com/item/440,2691204368,30318,5

Sold for Bubbling Mann of Reason (1)

1 * 0.9 = 0.9

http://www.tf2outpost.com/trade/19946777 Sold for Planets Ze Goggles (~18 keys = 1 bud)

1 * 0.9 = 0.9

Histories:

http://www.tf2outpost.com/item/440,2634889503,30041,5

http://www.tf2outpost.com/item/440,2619378150,177,5

Using a flat 0.9 on the Headlamp.

Bat Powdered mini:

http://www.tf2outpost.com/trade/20664100 Sold for Sunbeams Noir (4) (In the end nothing was added, though the counter-offer means overpay is applied)

4 * 0.9 = 3.6

Histories:

http://www.tf2outpost.com/item/440,2729800782,30069,5

http://www.tf2outpost.com/item/440,2712742650,319,5

http://www.tf2outpost.com/item/440,2712742650,319,5 Sold for Peace Tyro (2.9) + 40 keys (~2.2)

(2.9 * 0.9) + 2.2 = 4.81 (rounding to 4.8)

Histories:

http://www.tf2outpost.com/item/440,2729800782,30069,5

http://www.tf2outpost.com/item/440,2708385737,101,5

Using 3.6 - 4.8 on the Powdered.

Let it ride.