3 sales

1) 34 keys

https://backpack.tf/profiles/76561198112516663#!/compare/1550966400/1551052800

https://backpack.tf/profiles/76561198115074140#!/compare/1550966400/1551052800

Buy order probably.

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2) 38 keys

https://backpack.tf/profiles/76561198114402400#!/compare/1546560000/1546646400

https://backpack.tf/profiles/76561198280176587#!/compare/1546646400/1546732800

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3) 16 keys?

https://backpack.tf/profiles/76561198802991149#!/compare/1550966400/1551052800

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No marketplace sales.

https://marketplace.tf/items/30187;5;u86

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Total: 16, 34, 38

If you will find other sales, you're welcome to report them.