Item 1

https://backpack.tf/item/6799714640

Only one possible sale before it was gambled

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1687046400/1687132800

Buyer: https://backpack.tf/profiles/76561199161916038#!/compare/1688256000/1688342400

Marketpalce.tf Sales

https://marketplace.tf/items/tf2/1162;5;u3067

MP.TF Sale #1

Sold for $39.99 on August 5, 2023

Average Key Price @ $1.95ish

39.99/1.95 = 20.50ish keys

MP.TF Sale #2

Sold for $39.99 on August 9, 2023

Average Key Price @ $1.99ish

39.99/1.99 = 20.09ish keys

MP.TF Sale #3

Sold for $39.99 on August 11, 2023

Average Key Price @ $2ish

39.99/2 = 19.99ish keys

Sales @ 20, 20, 21

Taking 20-21 here