Item 1

https://backpack.tf/item/2594260980

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198089349272#!/compare/1683849600/1683936000

Buyer: https://backpack.tf/profiles/76561197998138853#!/compare/1680739200/1684281600

Item 2

https://backpack.tf/item/8704345970

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561199042511789#!/compare/1684108800/1684540800

Buyer: https://backpack.tf/profiles/76561199019420779#!/compare/1683072000/1685318400

Sale #3

Bulk transfer or untraceable-

Seller: https://backpack.tf/profiles/76561199019420779#!/compare/1685318400/1688860800

Buyer: https://backpack.tf/profiles/76561198188093413#!/compare/1687824000/1687910400

Marketplace.tf Sales

https://marketplace.tf/items/tf2/30182;5;u62

MP.TF Sale #1

Sold for $37.61 on July 23, 2023

Keys @ $1.95

37.61/1.95 = 19.29ish keys

MP.TF Sale #2

Sold for $37.61 on August 3, 2023

Keys @ $1.95

37.61/1.95 = 19.29ish keys

MP.TF Sale #3

Sold for $49.99 on August 6, 2023

Keys @ $2.01

49.99/2.01 = 24.87ish keys

Sales @ 19, 19, 25

Taking 19-25 here