Item 1:

https://backpack.tf/item/8315724087

Sale 1:

Sold for 14 Keys (Unusual ID: "14817733722")

https://backpack.tf/profiles/76561198849646740#!/compare/1723939200/1724284800

https://backpack.tf/profiles/76561197995651003#!/compare/1724198400/1724284800

Sale 2:

Untraceable

https://backpack.tf/profiles/76561197995651003#!/compare/1724457600/1724544000

https://backpack.tf/profiles/76561197991400533#!/compare/1724457600/1724544000

//

Item 2:

https://backpack.tf/item/8184159938

Sale 3:

1 Key traceable

https://backpack.tf/profiles/76561198170686275#!/compare/1721952000/1722124800

https://backpack.tf/profiles/76561198349848918#!/compare/1722038400/1722124800

Sale 4:

Sold for 15 Keys

https://backpack.tf/item/8562150413 (Key ID: "14730074379")

https://backpack.tf/profiles/76561198349848918#!/compare/1722297600/1722384000

https://backpack.tf/profiles/76561198136617526#!/compare/1720915200/1723507200

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Item 3:

https://backpack.tf/item/8207634260

Sale 5:

Untraceable

https://backpack.tf/profiles/76561198955185277#!/compare/1725667200/1726272000

https://backpack.tf/profiles/76561199581722058#!/compare/1725580800/1725667200

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Marketplace.TF Sales:

https://marketplace.tf/items/tf2/31080;5;u125

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

Sale 6:

https://backpack.tf/item/14089145231

$22.99/$1.71 = ~13 Keys (Jul 18)

Sale 7:

https://backpack.tf/item/8207634260

$22.99/$1.88 = ~12 Keys (Sep 3)

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Total Sales

12, 13, 14, 15

https://imgur.com/qnbzuv6

Taking 12 - 15 Keys

Unsolds:

https://backpack.tf/item/8315724087 - 35

https://backpack.tf/item/8195365451 - 35

https://backpack.tf/item/8166416195 - 40

https://backpack.tf/item/8278631807 - 90

https://backpack.tf/item/11592518352 - $29.99