Thanks to Kevin for non-pure sales

Thanks to polar for suggesting 16-25 range

Advertising for friend if that's allowed :P ------> http://www.tf2outpost.com/trade/27145086#my

Sale 1:

16 keys

Before: http://backpack.tf/profiles/76561198128606394?time=1440658800

After: http://backpack.tf/profiles/76561198128606394?time=1441522800

http://imgur.com/UnHa9hs

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Sale 2:

15.5 keys

Before: http://backpack.tf/profiles/76561198128606394?time=1441522800

After: http://backpack.tf/profiles/76561198128606394?time=1441782000

Rounding to 16

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Sale 3:

DP Dixie+~7 keys

http://backpack.tf/profiles/76561198007602707?time=1440399600 (August 24th)

http://backpack.tf/profiles/76561198007602707?time=1440486000 (August 25th)

http://backpack.tf/profiles/76561198007602707?time=1440486000&compare=1440399600

20*0.9=18+7=25

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Sale 4:

Overclocked Chef Hat

http://backpack.tf/profiles/76561198007602707?time=1440140400 (August 21st)

http://backpack.tf/profiles/76561198007602707?time=1440226800 (August 22nd)

http://backpack.tf/profiles/76561198007602707?time=1440226800&compare=1440140400

32.5*0.9=29, outlier due to current sellers

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Added Searing Mining for Time Warp Wraith

http://backpack.tf/profiles/76561198118077194?time=1439622000 (August 15th)

http://backpack.tf/profiles/76561198118077194?time=1439794800 (August 17th)

http://backpack.tf/profiles/76561198118077194?time=1439794800&compare=1439622000

old mining price

Added Searing Mining for Phos CM+Amarathine Robo-Topi

http://backpack.tf/profiles/76561198133272013?time=1439881200 (August 18th)

http://backpack.tf/profiles/76561198133272013?time=1440054000 (August 20th)

http://backpack.tf/profiles/76561198133272013?time=1439881200&compare=1440054000

old prices, bulk

other sales look like bulk

Taking 16-25