Credit to Foamy the Fearsome for showing me sale 2 was invalid and Ðε Ȥøȴεx²

Bootyful hat

Sale 1

http://backpack.tf/profiles/76561198097630665?time=1433401200 Before

http://backpack.tf/profiles/76561198097630665?time=1433487600 After

Sold for 24 Pure and a clean Max's Head

24 x 0.9 = ~22

24 + 22 = 46

Sale 2

http://backpack.tf/profiles/76561198067854106?time=1431241200 Before

http://backpack.tf/profiles/76561198067854106?time=1431327600 After

Sold for Ghastly Ghosts Jr. Scotsman Stovepipe

34.5 x 0.9 = 31

Used to price stovepipe.

Sale 3

http://backpack.tf/profiles/76561198122450540?time=1427439600 Before

http://backpack.tf/profiles/76561198122450540?time=1427871600 After

Sold for Miami Nights Rimmed Raincatcher with 16 keys.

14.5 x 0.9 = ~ 13

13 + 16 = 29

Quite Low.

It was recommended to use this as the outlier.