Item 1

https://backpack.tf/item/947028951

Not using this seeing that the whole history is a trade back

Item 2

https://backpack.tf/item/450073743

Spelled version, not using here

Item 3

https://backpack.tf/item/429161146

Sale #1

Transfer or untraceable-

Seller: https://backpack.tf/profiles/76561197971424377#!/compare/1684972800/1686787200

Buyer: https://backpack.tf/profiles/76561198028537694#!/compare/1685232000/1690070400

Sale #2

Sold with 40 keys for a Astral Presence Taunt: The Schadenfreude (not usable, no other sales for the Schadenfreude)-

Seller: https://backpack.tf/profiles/76561198028537694#!/compare/1690934400/1691366400

Buyer: https://backpack.tf/profiles/76561198104146629#!/compare/1691107200/1691539200

Item 4

https://backpack.tf/item/360071340

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561198261047630#!/compare/1687392000/1688688000

Buyer: https://backpack.tf/profiles/76561198109218538#!/compare/1687996800/1691539200

Marketplace.tf Sales

https://marketplace.tf/items/tf2/359;5;u17

MP.TF Sale #1

Sold for $399.99 on June 20, 2023

Keys @ $1.98

399.99/1.98 = 202.02ish keys

MP.TF Sale #2

Sold for $389.99 on July 22, 2023

Keys @ $1.95

389.99/1.95 = 199.99ish keys

Sales @ 200, 202

Rounding this to 200 flat and taking that