Item 1

https://backpack.tf/item/9733515173

Sale #1

Bulk transfer?-

Seller: https://backpack.tf/profiles/76561199101442624#!/compare/1686355200/1686441600

Buyer: https://backpack.tf/profiles/76561198116779194#!/compare/1686873600/1687132800

Item 2

https://backpack.tf/item/7617942539

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561199245733895#!/compare/1688083200/1688169600

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1688083200/1688169600

Sale #3

Sold for 24 keys (buyer's side)-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1689033600/1689120000

Buyer: https://backpack.tf/profiles/76561198319114954#!/compare/1689033600/1689120000

Marketplace.tf Sales

https://marketplace.tf/items/tf2/30066;5;u32

MP.TF Sale #3

Sold for $59.99 on May 7, 2023

Keys @ $2.03

59.99/2.03 = 29.55ish keys

MP.TF Sale #2

Sold for $59.99 on May 31, 2023

Keys @ $1.99

59.99/1.99 = 30.15ish keys

MP.TF Sale #3

Sold for $59.99 on July 4, 2023

Keys @ $2

59.99/2 = 30ish keys

Sales @ 24, 30, 30, 30

Taking 24-30 here