Item 1

https://backpack.tf/item/10429345613

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561199497014011#!/compare/1682985600/1683072000

Buyer: https://backpack.tf/profiles/76561199072654974#!/compare/1682899200/1682985600

Item 2

https://backpack.tf/item/10418024459

Sale #2

Bulk Sale-

Seller: https://backpack.tf/profiles/76561198105359319#!/compare/1682467200/1683158400

Buyer: https://backpack.tf/profiles/76561198105071091#!/compare/1682467200/1682553600

Item 3

https://backpack.tf/item/10330366270

Sale #3

Sold for 34 keys-

Seller: https://backpack.tf/profiles/76561198283682411#!/compare/1685836800/1685923200

Buyer: https://backpack.tf/profiles/76561199389372563#!/compare/1685318400/1685836800

Sale #4

Untraceable-

Seller: https://backpack.tf/profiles/76561199389372563#!/compare/1686096000/1686182400

Buyer: https://backpack.tf/profiles/76561198060068046#!/compare/1685836800/1686441600

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31200;5;u178

MP.TF Sale #1

Sold for $89.99 on May 4, 2023

Keys @ $2.05

89.99/2.05 = 43.90ish keys

MP.TF Sale #2-3

Sold for $79.99 on July 1, 2023

Keys @ $1.99

79.99/1.99 = 40.20ish keys

Sales @ 34, 40, 40, 44

Taking 34-40 here