Sale #1:

https://backpack.tf/profiles/76561198122051953#!/compare/1550707200/1550793600

Backpack sale?

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Sale #2:

https://backpack.tf/profiles/76561198197215790#!/compare/1550275200/1550361600

Bulky.

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Sale #3:

https://backpack.tf/profiles/76561198389382691#!/compare/1547510400/1547596800

Backpack sale?

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Sale #4:

https://backpack.tf/profiles/76561198294070108#!/compare/1547683200/1547942400

Sold for 9 keys.

9 keys

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Sale #5:

https://backpack.tf/profiles/76561198108628484#!/compare/1546128000/1546214400

Sold for 8 keys and 10 ref.

8 keys

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Sale #6:

https://marketplace.tf/items/30763;5;u3021

Sold on February 9, 2019 for $29.99.

$29.99 / $1.82 = ~16 keys

16 keys

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Sale #7:

https://marketplace.tf/items/30763;5;u3021

Sold on January 8, 2019 for $19.

$19 / $1.75 = ~11 keys

11 keys

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Sale #8:

https://marketplace.tf/items/30763;5;u3021

Sold on January 3, 2019 for $18.99.

$18.99 / $1.76 = ~11 keys

11 keys

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Sale #9:

https://marketplace.tf/items/30763;5;u3021

Sold on January 1, 2019 for $18.98.

$18.98 / $1.76 = ~11 keys

11 keys