Sale 1: ~22 Keys Pure.

https://backpack.tf/profiles/76561198238761904#!/compare/1555718400/1556064000

https://backpack.tf/profiles/76561198044209607#!/compare/1555718400/1555804800

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Sale 2: Untrace.

https://backpack.tf/profiles/76561198044209607#!/compare/1555977600/1556150400

https://backpack.tf/profiles/76561198859721638#!/compare/1555977600/1556150400

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sale 3: Bulk/Untrace.

https://backpack.tf/profiles/76561198859721638#!/compare/1555977600/1556236800

https://backpack.tf/profiles/76561198047819527#!/compare/1555977600/1556064000

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Sale 4: ~22 Keys.

https://backpack.tf/profiles/76561198047819527#!/compare/1556236800/1556323200

https://backpack.tf/profiles/76561198393588133#!/compare/1556236800/1556323200

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Sale 5: ~25 Keys Pure.

https://backpack.tf/profiles/76561198393588133#!/compare/1557446400/1557532800

https://backpack.tf/profiles/76561197993834789#!/compare/1557446400/1557532800

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Usable Sales: 22/22/25

Going with 22-25 keys.

Thanks to scourge for the premium!