Sale #1:

https://backpack.tf/profiles/76561198264858514#!/compare/1555891200/1555977600

Sold for 8.5 keys.

8.5 keys

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Sale #2:

https://backpack.tf/profiles/76561198157452762#!/compare/1556064000/1556150400

Sold for 9 keys and 30 ref.

9.5 keys

Sales:

8.5, 9.5. Going with 8.5 - 9.5 keys.