Polar suggested that I resuggest with new range.

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Sale 1: Sold for 17 keys in pure.

Sale - http://imgur.com/q80Qkmj

Before - http://backpack.tf/id/toreutic?time=1432969200

After - http://backpack.tf/id/toreutic?time=1433228400

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Sale 2: Sold for 13 keys pure

Sale - http://imgur.com/tcWJUye

Before - http://backpack.tf/profiles/76561198021228339?time=1432710000

After - http://backpack.tf/profiles/76561198021228339?time=1432796400

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Sale 3: Sold for 19 keys in pure

This sale is rather complicated so bear with me as I try to explain. (I used Julia's script btw)

Sale - Imgur - http://imgur.com/a/ADqeU

In the first picture it shows the difference between the 07/05 and the 31/05, these were the closest dates it allowed me to use. You clearly see that the Pencil Pusher is removed along with other certain items, however, due to the large time frame I can't tell if some of those keys that were removed where just resold so I went to the guy who received the Pencil Pusher (Second picture). In that picture, you see the guy receive the Pencil Pusher along with a Professional Killstreak Sniper Rifle and 26 keys being removed. Since Julia's script only allows me to see dates where the backpack changed, I know for a fact that the removed keys AND the New keys (in the first picture), where given to the person on the same date (the 31/05). This means that the person received 19 keys (I counted) and resold most of them, which explains the removed keys, in the same day. Now, there are the 7 left over keys that we don't know where they went. But, if you remember, he also obtained a Prof Killstreak sniper, and according to this site http://cheesecakeremix.deviantart.com/art/TF2-Killstreak-Kit-Prices-460844417 (which takes its prices from trade.tf and is a site that many people use) it means that bought it for low price probably, proof of this is here http://imgur.com/Gnb4xlu. Ok....that was kinda long.

First picture

Before - http://backpack.tf/profiles/76561198177229582?time=1430982000

After - http://backpack.tf/profiles/76561198177229582?time=1433055600

Second Picture

Before - http://backpack.tf/profiles/76561198063017465?time=1432364400

After - http://backpack.tf/profiles/76561198063017465?time=1432882800

Third Picture

Before - http://backpack.tf/profiles/76561198135766289?time=1432191600

After - http://backpack.tf/profiles/76561198135766289?time=1432278000

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Sale 4: Sold for 25 keys pure

Imgur - http://i.imgur.com/sHVkdG2.png

Credits to mb for this

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Conclusion: I am exhausted....

Real Conclusion: Taking a range on this one. And taking the 13 sale as an outlier.

Constructive Criticism and Counter Proof along with Helpful Feedback is appreciated :/