Item 1

https://backpack.tf/item/11920000676

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198166117038#!/compare/1658102400/1689724800

Buyer: https://backpack.tf/profiles/76561198850178158#!/compare/1689724800/1689811200

Item 2

https://backpack.tf/item/8153463919

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561199102407070#!/compare/1683849600/1683936000

Buyer: https://backpack.tf/profiles/76561199035732179#!/compare/1683936000/1684627200

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561199035732179#!/compare/1683936000/1684627200

Buyer: https://backpack.tf/profiles/76561199072654974#!/compare/1684540800/1684627200

Sale #4

Sold for 18 keys (keys in buyer's side match)-

Seller: https://backpack.tf/profiles/76561199072654974#!/compare/1686787200/1686873600

Buyer: https://backpack.tf/profiles/76561198865167622#!/compare/1686787200/1686873600

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31058;5;u128

MP.TF Sale #1

Sold for $50 on July 18, 2023

Keys @ $1.97

50/1.97 = 25.38ish keys

MP.TF Sale #2

Sold for $50 on July 27, 2023

Keys @ $1.95

50/1.95 = 25.64ish keys

Sales @ 18, 25, 26

Taking 18-26