Very special thanks to Icycrevasse for suffering with me!

Item 1

https://backpack.tf/item/13143686704

Sale #1

Probably traded between bot to owner, some stuff and an unusual were traded but it would still be way too low-

Seller: https://backpack.tf/profiles/76561199514562953#!/compare/1687651200/1687824000

Buyer: https://backpack.tf/profiles/76561198066809823#!/compare/1687737600/1687910400

Item 2

https://backpack.tf/item/13099909159

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561198099033529#!/compare/1685664000/1685750400

Buyer: https://backpack.tf/profiles/76561198040073503#!/compare/1687996800/1688169600

Item 3

https://backpack.tf/item/7263107255

Sale #3

Bulk Sale-

Seller: https://backpack.tf/profiles/76561198151054147#!/compare/1681430400/1682121600

Buyer: https://backpack.tf/profiles/76561198859721638#!/compare/1682035200/1682121600

Sale #4

Sold for 125 keys-

Seller: https://backpack.tf/profiles/76561198859721638#!/compare/1682121600/1682208000

Buyer: https://backpack.tf/profiles/76561198872222015#!/compare/1681948800/1682121600

Sale #5

Sold for a Purple Energy Coldfront Commander + one key (too low to use here)-

Seller: https://backpack.tf/profiles/76561198872222015#!/compare/1682121600/1682208000

Buyer: https://backpack.tf/profiles/76561199402506150#!/compare/1682035200/1682208000

Sale #6

Untraceable-

Seller: https://backpack.tf/profiles/76561199402506150#!/compare/1682553600/1682640000

Buyer: https://backpack.tf/profiles/76561199005803152#!/compare/1675296000/1684022400

Sale #7

Sold for a Terror-Watt Pomade Prince + a Steaming Pencil Pusher (using this sale for the Steaming Pencil)-

Seller: https://backpack.tf/profiles/76561199005803152#!/compare/1684281600/1684368000

Buyer: https://backpack.tf/profiles/76561198339572476#!/compare/1684281600/1684368000

Sale #8

Untraceable-

Seller: https://backpack.tf/profiles/76561198339572476#!/compare/1687046400/1687392000

Buyer: https://backpack.tf/profiles/76561199161916038#!/compare/1687046400/1687219200

Rest of the history is just gambling, not bothering with it

https://backpack.tf/item/7263107255

MP.TF Sale #1

Sold for $299.99 on June 1, 2023

Keys @ $1.99

299.99/1.99 = 150.75ish keys

https://marketplace.tf/items/tf2/5021;6

Sales @ 125, 151

Rounding down the range to 125-150 and taking that