1 year outdated.

sale 1: sold for demonflame bombing run[22 keys]

http://backpack.tf/profiles/76561198148811138?time=1432537200

http://backpack.tf/profiles/76561198148811138?time=1432796400

22*0.9=19.8 rounding to 20

sale 2: sold for ge bombing run[16.5 keys]+2 keys

http://backpack.tf/profiles/76561198148811138?time=1432191600

http://backpack.tf/profiles/76561198148811138?time=1432364400

16.5*0.9=14.85 rounding to 15

15+2=17

sale 3: sold with s.prof ks australium flame thrower for stormy merry+white bills

http://backpack.tf/profiles/76561198098308455?time=1432278000

http://backpack.tf/profiles/76561198098308455?time=1432364400

outlier, this makes the nappers rlly low

sale 4: sold for 19 keys+sweets adding up to a key~

http://backpack.tf/profiles/76561198086369219?time=1432364400

http://backpack.tf/profiles/76561198086369219?time=1432537200

sale 5: sold with s.widowmaker+s.f.rocket launcher+s.f.shotgun for sulphorous chamrers chapeau+shred alert+s.gold botkiller knife

http://backpack.tf/profiles/76561198051106100?time=1432882800

http://backpack.tf/profiles/76561198051106100?time=1432969200

should be used to price chapeau

1 sale at 17, 2 sales at 20.

taking final price as 17-20 keys.