https://backpack.tf/item/3971856774

10 keys + over half a key of metal so the sale rounds to 11:

https://backpack.tf/profiles/76561198131911699#!/compare/1708819200/1708905600

https://backpack.tf/profiles/76561198090310123#!/compare/1708819200/1708905600

https://backpack.tf/item/10896394558

Untrace:

https://backpack.tf/profiles/76561198129310093#!/compare/1702425600/1702512000

https://backpack.tf/profiles/76561198099263505#!/compare/1702425600/1702512000

12.66 ref matches, Quicksell.Store dump:

https://backpack.tf/profiles/76561198099263505#!/compare/1708128000/1708214400

https://backpack.tf/profiles/76561199059800460#!/compare/1708128000/1708214400

13 keys:

https://backpack.tf/profiles/76561199059800460#!/compare/1708819200/1708905600

https://backpack.tf/profiles/76561198069356441#!/compare/1708819200/1708905600

~~

https://marketplace.tf/items/tf2/1110;5;u3065

November 29: $49.99/1.72=29.06 ~29 keys

Graph doesn't show this date anyore so all I can do is take 1.72 for the key price since it's the nearest we have https://marketplace.tf/items/tf2/5021;6

~~

https://backpack.tf/item/3971856774 Seller at 21 for 2 days

Although 2 days isn't enough to counter a sale, the sale at 29 is really far apart from the 2 pure sales. Buyers are way over 11 so gonna exclude 11 too and go with 13 flat.