Item 1

https://backpack.tf/item/11414124970

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198009089083#!/compare/1687910400/1688947200

Buyer: https://backpack.tf/profiles/76561197960466656#!/compare/1688083200/1688601600

Sale #2

Bulk transfer?-

Seller: https://backpack.tf/profiles/76561197960466656#!/compare/1688860800/1690675200

Buyer: https://backpack.tf/profiles/76561198188093413#!/compare/1689897600/1690329600

Item 2

https://backpack.tf/item/10971670771

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561198311498888#!/compare/1687219200/1687305600

Buyer: https://backpack.tf/profiles/76561198326894277#!/compare/1687219200/1687305600

Sale #4

Untraceable-

Seller: https://backpack.tf/profiles/76561198326894277#!/compare/1687219200/1687305600

Buyer: https://backpack.tf/profiles/76561199134904484#!/compare/1687305600/1687824000

Item 3

https://backpack.tf/item/10827161840

Sale #5

Sold for a Starstorm Insomnia Kiss King + 1 key (not usable, no usable sales for the Kiss King plus its a bot dump)-

Seller: https://backpack.tf/profiles/76561199204251336#!/compare/1684108800/1688860800

Buyer: https://backpack.tf/profiles/76561198850121720#!/compare/1684800000/1684886400

Sale #6

Untraceable-

Seller: https://backpack.tf/profiles/76561198850121720#!/compare/1685491200/1685577600

Buyer: https://backpack.tf/profiles/76561199117042773#!/compare/1685664000/1688342400

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31212;5;u196

MP.TF Sale #1

Sold for $49.99 on May 16, 2023

Keys @ $2.02

49.99/2.02 = 24.75ish keys

MP.TF Sale #2

Sold for $49.99 on June 19, 2023

Keys @ $1.99

49.99/1.99 = 25.12ish keys

MP.TF Sale #3

Sold for $49.99 on August 2, 2023

Keys @ $1.95

49.99/1.95 = 25.64ish keys

Sales @ 25, 25, 26

Taking 25-26