Resuggestion, thx Blaze

History 1: https://backpack.tf/item/7957160289

Untraceable:

https://backpack.tf/profiles/76561198850274253#!/compare/1606089600/1606176000

https://backpack.tf/profiles/76561198374008693#!/compare/1605744000/1606176000

Dumped to Tradeit.GG, can't trace the sale though

https://backpack.tf/profiles/76561198374008693#!/compare/1606176000/1606262400

https://backpack.tf/profiles/76561198297025510#!/compare/1605571200/1606262400

Untraceable:

https://backpack.tf/profiles/76561198297025510#!/compare/1607126400/1607299200

https://backpack.tf/profiles/76561198825455950#!/compare/1612310400/1612310400

History 2: https://backpack.tf/item/7956917289

Bulk:

https://backpack.tf/profiles/76561199093588714#!/compare/1606348800/1606435200

https://backpack.tf/profiles/76561198905440732#!/compare/1606694400/1607558400

Untraceable:

https://backpack.tf/profiles/76561198905440732#!/compare/1608076800/1608249600

https://backpack.tf/profiles/76561198311498888#!/compare/1608163200/1608249600

Bulk:

https://backpack.tf/profiles/76561198311498888#!/compare/1612137600/1612224000

https://backpack.tf/profiles/76561198012566431#!/compare/1611187200/1612224000

History 3: https://backpack.tf/item/7955759178

Untraceable:

https://backpack.tf/profiles/76561198155386309#!/compare/1605657600/1605744000

https://backpack.tf/profiles/76561198090484379#!/compare/1605744000/1606262400

Untraceable:

https://backpack.tf/profiles/76561198090484379#!/compare/1605744000/1606262400

https://backpack.tf/profiles/76561198402495238#!/compare/1605744000/1605830400

Untraceable:

https://backpack.tf/profiles/76561198402495238#!/compare/1605744000/1605830400

https://backpack.tf/profiles/76561198090987063#!/compare/1605657600/1605744000

Bulk:

https://backpack.tf/profiles/76561198090987063#!/compare/1605744000/1605830400

https://backpack.tf/profiles/76561198820335875#!/compare/1605657600/1605744000

Untraceable:

https://backpack.tf/profiles/76561198820335875#!/compare/1605744000/1605830400

https://backpack.tf/profiles/76561198135730477#!/compare/1605744000/1605830400

Untraceable:

https://backpack.tf/profiles/76561198135730477#!/compare/1605744000/1605830400

https://backpack.tf/profiles/76561198061353482#!/compare/1605744000/1605830400

Untraceable:

https://backpack.tf/profiles/76561198061353482#!/compare/1605830400/1605916800

https://backpack.tf/profiles/76561198057194383#!/compare/1605830400/1605916800

7 keys 6.55 ref, ~7 keys:

https://backpack.tf/profiles/76561198057194383#!/compare/1605830400/1605916800

https://backpack.tf/profiles/76561198841279602#!/compare/1605830400/1605916800

1 key 2 ref matches, more must have been involved:

https://backpack.tf/profiles/76561198841279602#!/compare/1606262400/1606348800

https://backpack.tf/profiles/76561198032176942#!/compare/1606348800/1606435200

Untraceable:

https://backpack.tf/profiles/76561198032176942#!/compare/1606348800/1606435200

https://backpack.tf/profiles/76561197973915883#!/compare/1604880000/1606435200

Untraceable/dumped to Quicksell.Store:

https://backpack.tf/profiles/76561197973915883#!/compare/1606435200/1606521600

https://backpack.tf/profiles/76561199085116273#!/compare/1606348800/1606435200

Bulk:

https://backpack.tf/profiles/76561199085116273#!/compare/1606953600/1607040000

https://backpack.tf/profiles/76561198155386309#!/compare/1606780800/1607040000

Untraceable/dumped to Tradeit.gg:

https://backpack.tf/profiles/76561198155386309#!/compare/1607040000/1607126400

https://backpack.tf/profiles/76561198297561873#!/compare/1607040000/1607126400

Marketplace.tf: https://marketplace.tf/items/tf2/30418;5;u59

November 27: $17.9/1.76=10.17 ~10 keys

From Blaze:

https://backpack.tf/profiles/76561198143595654#!/compare/1614211200/1615334400 - sold for 8 keys

https://backpack.tf/profiles/76561198311498888#!/compare/1615075200/1615161600 - dumped to stn.tf

https://backpack.tf/profiles/76561198274796755#!/compare/1615248000/1615334400

https://backpack.tf/profiles/76561198097427947#!/compare/1615248000/1615334400 - bulk

8 - 10 keys should be fine here