Thanks Randy :)

Sale 1: (outlier)

Sold for 9 keys (1 in ref) and a Spec. Gold Botkiller Scattergun Mk.II

(5*0.9) + 9 = 13.5 capping at 10 keys

http://www.tf2outpost.com/trade/25407551 & http://www.tf2outpost.com/trade/25416457 B/O of 10

http://backpack.tf/profiles/76561198000914623?time=1426662000 (March 18th)

http://backpack.tf/profiles/76561198000914623?time=1426748400 (March 19th)

Sale 2

Sold for a O.F Noir - After overpay = 16 keys

Before - http://backpack.tf/profiles/76561198080496569?time=1433746800

After - http://backpack.tf/profiles/76561198080496569?time=1434178800

Sale 3

Sold for a Disco Beat Down Bootleg Base Metal Billycock = 12 keys Check mini below

Before - http://backpack.tf/profiles/76561198159107535?time=1431428665

After - http://backpack.tf/profiles/76561198159107535?time=1431673200

Notes:

Mini for the Specialized Killstreak Gold Botkiller Scattergun Mk.II

2 sold for $9.40 on the SCM on the day of the sale

(9.4/2.4) = 4.7 rounding to 5 keys

http://steamcommunity.com/market/listings/440/Strange%20Specialized%20Killstreak%20Gold%20Botkiller%20Scattergun%20Mk.II

Mini for Billycock - Sold for a Searing Mullet After overpay = 12 keys

Before - http://backpack.tf/profiles/76561198096381808?time=1432710000

After - http://backpack.tf/profiles/76561198096381808?time=1432850884

Conclusion:

An outlier at 10 and sales at 12 - 16 keys.