Item 1

https://backpack.tf/item/8321116920

Sale #1

Sold for 34 keys-

Seller: https://backpack.tf/profiles/76561199085116273#!/compare/1684281600/1684368000

Buyer: https://backpack.tf/profiles/76561198035066643#!/compare/1684368000/1685318400

Item 2

https://backpack.tf/item/7957253868

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561198850178158#!/compare/1683590400/1683676800

Buyer: https://backpack.tf/profiles/76561198261483133#!/compare/1683590400/1683676800

Item 3

https://backpack.tf/item/11856599171

Sale #3

Sold for 29 keys-

Seller: https://backpack.tf/profiles/76561198051159272#!/compare/1687910400/1688169600

Buyer: https://backpack.tf/profiles/76561198278773467#!/compare/1687996800/1688169600

Sale #4

Sold with 40 refined for a Phantom Crown Spooky Head-Bouncers (18 keys) + a Circling TF Logo Noble Nickel Amassment of Hats (12 keys) = 12+18 - 40 refined = 29ish keys-

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

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

Sale #5

Untraceable-

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

Buyer: https://backpack.tf/profiles/76561198327624724#!/compare/1688601600/1688688000

Sale #6

Sold with 9 keys for a Cloud 9 Hat Outta Hell (using this to price the Hat Outta Hell)-

Seller: https://backpack.tf/profiles/76561198327624724#!/compare/1688688000/1688774400

Buyer: https://backpack.tf/profiles/76561198069143099#!/compare/1688688000/1689033600

Sale #7

Untraceable-

Seller: https://backpack.tf/profiles/76561198069143099#!/compare/1689033600/1689120000

Buyer: https://backpack.tf/profiles/76561198094059650#!/compare/1689897600/1690156800

MP.TF Sale #1

Sold for $77.99 on July 18, 2023

Keys @ $1.97

77.99/1.97 = 39.59ish keys

https://marketplace.tf/items/tf2/30362;5;u57

Sales @ 29, 29, 34, 40

Taking 34-40 here