Item 1:

https://backpack.tf/item/10570045614 - Listed on Mp.tf

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Item 2:

https://backpack.tf/item/13374739831

Sale 1:

Sold for 39 Keys

https://backpack.tf/profiles/76561198050518375#!/compare/1696550400/1696636800

https://backpack.tf/profiles/76561198133969522#!/compare/1695600000/1696636800

Sale 2:

Sold for ~20 Keys

https://backpack.tf/profiles/76561198133969522#!/compare/1698969600/1699142400

https://backpack.tf/profiles/76561199111073161#!/compare/1699056000/1699142400

Sale 3:

https://backpack.tf/profiles/76561199111073161#!/compare/1701561600/1701648000

https://backpack.tf/profiles/76561198355453608#!/compare/1701648000/1701734400

Sale 4:

Sold for 27 Keys + 30 ref → ~28 Keys

https://backpack.tf/profiles/76561199111073161#!/compare/1701561600/1701648000

https://backpack.tf/profiles/76561198355453608#!/compare/1701648000/1701734400

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Item 3:

https://backpack.tf/item/13284533298

Sale 5:

Sold for 28 Keys

https://backpack.tf/profiles/76561199139034449#!/compare/1699142400/1699228800

https://backpack.tf/profiles/76561198142500759#!/compare/1699228800/1699315200

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Item 4:

https://backpack.tf/item/13251123764

Sale 6:

Untraceable/Gambled

https://backpack.tf/profiles/76561198250065232#!/compare/1698278400/1698710400

https://backpack.tf/profiles/76561199445617373#!/compare/1698105600/1698710400

Sale 7:

Untraceable/Gambled

https://backpack.tf/profiles/76561199445617373#!/compare/1698105600/1698710400

https://backpack.tf/profiles/76561199245733895#!/compare/1698624000/1698710400

Sale 8:

Untraceable/Gambled

https://backpack.tf/profiles/76561199245733895#!/compare/1698624000/1698710400

https://backpack.tf/profiles/76561199161916038#!/compare/1698710400/1698796800

Sale 9:

Untraceable/Gambled

https://backpack.tf/profiles/76561199161916038#!/compare/1698796800/1698883200

https://backpack.tf/profiles/76561199444989440#!/compare/1697932800/1698796800

Sale 10:

Untraceable/Gambled

https://backpack.tf/profiles/76561199444989440#!/compare/1698796800/1698883200

https://backpack.tf/profiles/76561199161916038#!/compare/1698883200/1698969600

Sale 11:

Untraceable/Gambled

https://backpack.tf/profiles/76561199161916038#!/compare/1698883200/1698969600

https://backpack.tf/profiles/76561198405570201#!/compare/1698883200/1699747200

Sale 12:

Untraceable/Gambled

https://backpack.tf/profiles/76561198405570201#!/compare/1698883200/1699747200

https://backpack.tf/profiles/76561198299801919#!/compare/1698796800/1698883200

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Item 5:

https://backpack.tf/item/12476304393 - Mannco Sale

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Item 6:

https://backpack.tf/item/11438219031

Sale 13:

idk, maybe bulk for Tesla Coil Dark Falkirk Helm

https://backpack.tf/profiles/76561198083857846#!/compare/1698969600/1699056000

https://backpack.tf/profiles/76561198072355915#!/compare/1698969600/1699056000

Sale 14:

Bulk for 64 Keys

https://backpack.tf/profiles/76561198072355915#!/compare/1698969600/1699056000

https://backpack.tf/profiles/76561198445317265#!/compare/1699056000/1699142400

Sale 15:

Sold for 20 Keys + Solar Scorched Taunt: The Profane Puppeteer

https://backpack.tf/profiles/76561198445317265#!/compare/1699056000/1699142400

https://backpack.tf/profiles/76561198869102814#!/compare/1698969600/1699660800

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Item 7:

https://backpack.tf/item/11369281827

Sale 16:

Sold for 30 Keys

https://backpack.tf/profiles/76561198261483133#!/compare/1697846400/1697932800

https://backpack.tf/profiles/76561198069289053#!/compare/1697932800/1698105600

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Total Sales

20, 28, 28, 30, 39

https://imgur.com/0ERtVuH

Taking 28 - 30 keys