I think this is more reasonable.

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Sale 1

Sold for nuts n bolts pyromancer's mask = 28 * 0.9 = 25 keys

Seller before: http://backpack.tf/profiles/76561198070836705?time=1435906800 (July 3rd)

Seller after: http://backpack.tf/profiles/76561198070836705?time=1436166000 (July 6th)

Compare link: http://backpack.tf/profiles/76561198070836705?time=1435906800&compare=1436166000

• Mini on pyromancer's - ty to Kevin the Chicken God for the mini

  Sold for smoking hound dog (13) and ~15 key sweets = 28 keys

  
  

  Seller before: http://backpack.tf/profiles/76561198158459733?time=1436857200 (July 14th)

  Seller after: http://backpack.tf/profiles/76561198158459733?time=1436943600 (July 15th)

  Compare link: http://backpack.tf/profiles/76561198158459733?time=1436857200&compare=1436943600

• Micro on smoking hound dog:

  Sold for 13 keys

  
  

  Seller before: http://backpack.tf/profiles/76561198035308553?time=1438671600 (August 4th)

  Seller after: http://backpack.tf/profiles/76561198035308553?time=1438758000 (August 5th)

  Compare link: http://backpack.tf/profiles/76561198035308553?time=1438671600&compare=1438758000

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Sale 2

Sold with screaming tiger spent well spirits for specialized aussie scattergun - what

Seller before: http://backpack.tf/profiles/76561198064224452?time=1439103600 (August 9th)

Seller after: http://backpack.tf/profiles/76561198064224452?time=1439190000 (August 10th)

Compare link: http://backpack.tf/profiles/76561198064224452?time=1439103600&compare=1439190000

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Sale 3

Sold for max's head = 24 * 0.95 = 23 keys

Seller before: http://backpack.tf/profiles/76561198123977468?time=1432969200 (May 30th)

Seller after: http://backpack.tf/profiles/76561198123977468?time=1433142000 (June 1st)

Compare link: http://backpack.tf/profiles/76561198123977468?time=1432969200&compare=1433142000

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Could not figure out the other sales, either complex or gaps in histories, etc. Feedback and additional proof is welcome.