Sold for 4 keys

https://backpack.tf/profiles/76561198311498888#!/compare/1771372800/1771459200

https://backpack.tf/profiles/76561199271935963#!/compare/1771286400/1771718400

https://backpack.tf/item/11017950875

= 4 keys

Marketplace Sales:

https://marketplace.tf/items/tf2/31207;5;u3183

$7.49, December 28th & 31st

https://marketplace.tf/items/tf2/5021;6 - keys were:

https://backpack.tf/item/13969608447 - 28th

https://backpack.tf/item/15049237621 - 31st (not confident on these)

https://backpack.tf/item/11017950875 - this one most likely replaces one of them, and was dumped to a bot afterwards.

$1.88, December 28th

$1.85, December 31st

7.49/1.88 = 3.984, rounds to 4 keys

7.49/1.85 = 4.049, rounds to 4.05 keys

Other Sales:

#1

https://backpack.tf/profiles/76561199059160806#!/compare/1767916800/1768003200

https://backpack.tf/profiles/76561198311498888#!/compare/1768176000/1768262400

https://backpack.tf/item/11017950875

Untraceable, missing info in history

https://backpack.tf/item/14997371764 - mannco

https://backpack.tf/item/14996639027 - quicksell.store bots

https://backpack.tf/item/12472595121 - quicksell.store bots

Sellers:

https://i.imgur.com/heBMmMf.png

https://backpack.tf/item/14996639027 - 5 keys

https://marketplace.tf/items/tf2/31207;5;u3183

https://backpack.tf/item/12314903387 - $7.49, ~4 keys

Sales at:

The 3rd marketplace history I included could suggest a dump after purchase, which at worst would invalidate the sale at 4.05 keys if it turns out to be that one. Given the negligible difference it would make here, I’m going to just stick with the range.

Taking 4-4.05 keys.