https://backpack.tf/item/1914451302

https://backpack.tf/item/7956138916

https://backpack.tf/item/7957168725

Sale 1

https://backpack.tf/item/7956138916

https://gladiator.tf/listings/618eef6c41b0e113196747f6

https://backpack.tf/profiles/76561198280524116#!/compare/1636675200/1636848000

Sold for 8 Keys 57.88 Refined

Sale 2

https://backpack.tf/profiles/76561198029074524#!/compare/1636675200/1639440000

https://backpack.tf/profiles/76561198029074524#!/compare/1636675200/1636848000

Completely Untraceable.

Sale 3

https://backpack.tf/profiles/76561198059981682#!/compare/1637107200/1637280000

https://backpack.tf/profiles/76561198080179568#!/compare/1637107200/1637280000

Untraceable.

Sale 6

https://backpack.tf/profiles/76561198850274253#!/compare/1641600000/1641686400

https://backpack.tf/profiles/76561199033261365#!/compare/1640736000/1641772800 - sold for 9 keys

Sale 7

https://imgur.com/a/tBflghB

8.35 Keys. Untraceable via bp.tf - Rounding to 8.5

MP.tf

https://marketplace.tf/items/tf2/330;5;u57

19.99/1.84 = 10.9 = Rounding to 11

19.99/1.89 = 10.6 = Rounding to 11

19.99/1.8 = 11.1 Rounding to 11

Sales total - 8.5,9,9,11,11,11,11

Range of 8.5-11

Taking 9 as too low, Buyers at close to 11. Flat at 11 keys as suggested by Blaze.

If you have found another sale please let me know, Thanks to Vege and Blaze for help.