requested by mindacos.

sale 1: sold for DP sensei[23 keys]

http://backpack.tf/profiles/76561198057682951?time=1434092400

http://backpack.tf/profiles/76561198057682951?time=1434351600

23*0.9=20.7 rounding to 21

sale 2: sold for aces high festive tree[30 keys via mini]

http://backpack.tf/profiles/76561198075368577?time=1434610800

http://backpack.tf/profiles/76561198075368577?time=1434697200

sale 3: sold for lvl 1 max head[24 keys]+ a key in sweets

http://backpack.tf/profiles/76561198151960405?time=1432882800

http://backpack.tf/profiles/76561198151960405?time=1432969200

24+1=25

25*0.9=22.5 rounding to 23

mini on tree: sold with 6 keys for cauldron bubbles headwarmer[40.5 keys]

http://backpack.tf/profiles/76561198065425005?time=1434956400

http://backpack.tf/profiles/76561198065425005?time=1435042800

40.5*0.9=36.45 rounding to 36

36-6=30

sales at 21, 23 and 30. calling 30 an outlier.

taking final price of 21-23 keys.