Item 1

https://backpack.tf/item/10919043516

Sale #1

Bulk-

Seller: https://backpack.tf/profiles/76561198104056646#!/compare/1688428800/1688515200

Buyer: https://backpack.tf/profiles/76561198278773467#!/compare/1688256000/1688515200

Item 2

https://backpack.tf/item/10816152991

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561199110809353#!/compare/1685750400/1685836800

Buyer: https://backpack.tf/profiles/76561198114392649#!/compare/1685750400/1686700800

Item 3

https://backpack.tf/item/13171483500

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561198385776245#!/compare/1649980800/1687910400

Buyer: https://backpack.tf/profiles/76561199161916038#!/compare/1687910400/1687996800

Sale #4

Untraceable-

Seller: https://backpack.tf/profiles/76561199161916038#!/compare/1688774400/1688860800

Buyer: https://backpack.tf/profiles/76561198453530349#!/compare/1688774400/1688860800

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31209;5;u196

MP.TF Sale #1

Sold for $39.99 on May 4, 2023

Keys @ $2.05

39.99/2.05 = 19.51ish keys

MP.TF Sale #2

Sold for $39.99 on June 17, 2023

Keys @ $2.02

39.99/2.02 = 19.80ish keys

MP.TF Sale #3

Sold for $35 on July 7, 2023

Keys @ $1.99

35/1.99 = 17.59ish keys

MP.TF Sale #4

Sold for $35 on July 19, 2023

Keys @ $1.97

35/1.97 = 17.77ish keys

Sales @ 18, 18, 20, 20

Taking 18 flat