Thanks to Foamy for the info.

Re-suggestion with a replaced Sale 2.

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Sale 1:

https://backpack.tf/profiles/76561198070727561#!/compare/1518652800/1518739200

https://backpack.tf/profiles/76561198449473770#!/compare/1518652800/1518739200

Sold with Burning Base Metal(34.5) + Pro KS Strange Rescue Ranger(2.38) + Strange Pro KS Escape Plan(2.58) for Burning Titanium(82.5)

Total is 82.5 - (34.5 + 2.38 + 2.58) = 43.04keys

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Sale 2:

https://imgur.com/a/yfBPt

Sold for 27 pure

(credits to .Chemo)

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Sale 3:

https://backpack.tf/profiles/76561198803495776#!/compare/1516579200/1516665600

https://backpack.tf/profiles/76561198066195760#!/compare/1516579200/1516665600

Sold with Burning Tin Topi(35) for GE Sinner + Stormy Tavish(10.5)

Sinner Mini:

https://backpack.tf/profiles/76561198096802308#!/compare/1518134400/1518307200

https://backpack.tf/profiles/76561198114764948#!/compare/1518220800/1518307200

Sold for Aces BoA(49)

https://backpack.tf/profiles/76561198109741995#!/compare/1516147200/1516233600

https://backpack.tf/profiles/76561198203307876#!/compare/1516147200/1516233600

Sold for 25 pure.

only 2 traceable sales, too big of a discrepancy to price accurately.

Not using this sale.

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Sale 4:

https://backpack.tf/profiles/76561198122083141#!/compare/1517529600/1517616000

.Sold for 25 pure.

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Sale 5:

https://backpack.tf/profiles/76561198066195760#!/compare/1517356800/1517529600

Sold for GF Bucket Hat + Steaming Company Man(17)

Bucket Hat Mini:

https://backpack.tf/profiles/76561198388803476#!/compare/1515715200/1518912000

https://backpack.tf/profiles/76561198079390089#!/compare/1515715200/1515888000

Sold for C9 Electric Escorter(11.5) + 17.44 ref

Total is 11.97 keys, rounding to 12.

https://backpack.tf/profiles/76561198213917739#!/compare/1516320000/1516665600

Sold with PF Gym Rat(12) for Peace Sign Nickel(23)

Total is 11 keys.

https://backpack.tf/profiles/76561198278219766#!/compare/1516060800/1516233600

https://backpack.tf/profiles/76561198213917739#!/compare/1515024000/1516233600

Sold for 10 keys 36 ref

Using 11-12 keys, averaging at 11.5 keys

Total is 17 + 11.5 = 28.5 keys.

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Sale 6:

https://backpack.tf/profiles/76561198369249095#!/compare/1517616000/1517702400

Sold for 24 pure

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Sale 7:

https://backpack.tf/profiles/76561198113824319#!/compare/1517529600/1517702400

Sold with 4 keys for (Duped) Misty Skull HWOAH

This is the only sale for the Misty HWOAH, not using.

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Sale 8:

https://backpack.tf/profiles/76561198113824319#!/compare/1518393600/1518825600

Sold for 24 pure + 7 ref

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Total sales @ 24, 24.19, 25, 27, 28.5, 43.04

sales at 25 and under sold as QS(within a day or two)

Calling 43.04 as an outlier

Rounding 28.5 to 29, using 27 - 29 as a range.