Sale #1:

https://backpack.tf/profiles/76561198079869886#!/compare/1546560000/1546732800

Sold for 14 keys.

14 keys

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Sale #2:

https://backpack.tf/profiles/76561198148729253#!/compare/1546732800/1546819200

Untraceable.

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Sale #3:

https://backpack.tf/profiles/76561198067617576#!/compare/1547596800/1547683200

Sold for 14 keys.

14 keys

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Sale #4:

https://backpack.tf/profiles/76561198067617576#!/compare/1548547200/1549065600

Untraceable.

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Sale #5:

https://backpack.tf/profiles/76561198079569192#!/compare/1548892800/1552435200

Sold for 15 keys.

15 keys

Sales:

14, 14, 15. Going with 14 - 15 keys.