Resuggestion, thx Blaze

https://backpack.tf/item/8377833085

Untraceable:

https://backpack.tf/profiles/76561198042754411#!/compare/1605312000/1605398400

https://backpack.tf/profiles/76561198091502579#!/compare/1605398400/1605484800

Marketplace.tf seller at $60

https://backpack.tf/item/6912766279

35 keys:

https://backpack.tf/profiles/76561198850121720#!/compare/1600905600/1600992000

https://backpack.tf/profiles/76561198091502579#!/compare/1600992000/1601078400

https://marketplace.tf/items/tf2/1172;5;u3033

https://backpack.tf/item/8341864183 September 22: $77.78/1.85=42.04 keys ~42

Two histories with other Marketplace.tf sales, not sure which one is which https://backpack.tf/item/7008084854 https://backpack.tf/item/6912766279

November 4: $64.99/1.82=35.71 keys ~36

November 6: $68/1.81=37.57 keys ~38

November 15: $48/1.78=26.97 keys ~27

December 6: $74.56/1.76=42.36 keys ~42

We have 27, 35, 36, 38, 42 and 42.

Excluding 27 because it's lower than quickbuyers

Excluding 42 because we're excluding a lower value and there are sellers at ~38 keys on Marketplace.tf

35-38 should be good