CaCO3 π

Sale 1

http://www.tf2outpost.com/trade/27127021 Sold for 14 keys pure

B/O for Spartan was 14

X = 14

Keys http://backpack.tf/profiles/76561198134785308?time=1443769200&compare=1444201200

Spartan http://backpack.tf/item/1409981902

Sale 2

http://www.tf2outpost.com/trade/27027517 Sold for Blizz Bombing + 1 key in sweets

B/O for Defiant was 10...?

Ignoring B/O since with the B/O it would be an outlier

Bombing had no trade, presuming offered

X = 13*0.9 + 1*0.9

X = 13

Bombing http://backpack.tf/item/1069229637

Spartan http://backpack.tf/item/506506400

Mini for BOmbing

[No OP Trade] Sold for Steaming Guad

X = 14.5*0.9

X = 13

Guad http://backpack.tf/item/1114407332

Bombing http://backpack.tf/item/1069229637