Item 1

https://backpack.tf/item/11924728361

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198188093413#!/compare/1687651200/1687737600

Buyer: https://backpack.tf/profiles/76561198098415136#!/compare/1687737600/1687910400

Item 2

https://backpack.tf/item/11920008326

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561198242679644#!/compare/1688342400/1688688000

Buyer: https://backpack.tf/profiles/76561198043118637#!/compare/1688688000/1689033600

Item 3

https://backpack.tf/item/13103045510

Sale #3

Sold for 18 keys + 55.22 refined (buyer's side)-

Seller: https://backpack.tf/profiles/76561198113992461#!/compare/1686873600/1686960000

Buyer: https://backpack.tf/profiles/76561198319114954#!/compare/1686873600/1686960000

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31271;5;u256

MP.TF Sale #1

Sold for $52.95 on May 13, 2023

Keys @ $2.02

52.95/2.02 = 26.21ish keys

MP.TF Sale #2

Sold for $49.99 on August 11, 2023

Keys @ $2

49.99/2 = 25ish keys

MP.TF Sale #3

Sold for $49.99 on August 12, 2023

Keys @ $2

49.99/2 = 25ish keys

Sales @ 19, 25, 25, 26

Taking 19-25