Sale #1:

https://backpack.tf/profiles/76561198036879123#!/compare/1550620800/1552348800

Sold for 9 keys and 6 ref.

9 keys

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Sale #2:

https://backpack.tf/profiles/76561198335791307#!/compare/1551398400/1551484800

Key histories don't match, unsure.

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Sale #3:

https://backpack.tf/profiles/76561198101185165#!/compare/1551484800/1551916800

Sold for a Nuts n' Bolts Brass Bucket (10 keys) and a Strange Specialized Killstreak Phlogistinator (~1 key)

11 keys

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Minis:

Nuts n' Bolts Brass Bucket:

https://backpack.tf/profiles/76561198067231684#!/compare/1551657600/1551916800

Sold for 10 keys and 15 ref.

10 keys

Sales:

9, 11. Going with 11 keys.