I am confused as hell

9 months outdated

Sale 1

Sold for KaW Chieftain + Blizz Storm Pillar of hats + 25 keys pure + ~3 keys in items

http://backpack.tf/profiles/76561198097640992?time=1431682484 -> http://backpack.tf/profiles/76561198097640992?time=1431759600

(22 + 30 + 3)* 0.9 + 25 = 74.5 (75)

Mini for Pillar

http://backpack.tf/profiles/76561198083772462?time=1430982000 -> http://backpack.tf/profiles/76561198083772462?time=1431068400

Sold for 22 keys pure

Mini for Chieftain

*Unable to find valid sales

http://www.tf2outpost.com/trade/25966635 B/O @ 30

Sale 2 (outlier)

Sold for Overclocked El Jefe + Searing Officer's Ushanka

http://backpack.tf/profiles/76561198118618694?time=1431457700 -> http://backpack.tf/profiles/76561198118618694?time=1431500400

(42 + 17.5)* 0.9 = 53.55 (54)

Sale 3

Sold for PE Beak

http://backpack.tf/profiles/76561198056180801?time=1430539579 -> http://backpack.tf/profiles/76561198056180801?time=1430550000

104 * 0.9 = 93.6 (94)

Sale 4 (outlier, quicksold)

Sold for 57 keys pure

http://backpack.tf/profiles/76561198057913267?time=1431310199 -> http://backpack.tf/profiles/76561198057913267?time=1431327600

Feel free to support/counter my proof