Theres more indates that need to be included, heres a summary:

Found 2 instances with non-empty history.

[Instance #0]: https://backpack.tf/item/9820563391

[Instance #1]: https://backpack.tf/item/8016481226

[Transaction #0]:

https://backpack.tf/profiles/76561197962261994#!/compare/1667174400/1667260800

https://backpack.tf/profiles/76561198820238917#!/compare/1667174400/1667260800

Checking for common item ids on both sides of transaction:

[Added]:

Cloud 9 Handyman's Handle - 18.023 keys - 1 items

Contagious Eruption Undercover Brolly - 0.0 keys - 1 items

Cool Kiln and Conquer Rocket Launcher (Battle Scarred) - 0.0 keys - 1 items

Dead Presidents Heer's Helmet - 15.019 keys - 1 items

Disco Beat Down Détective Noir - 20.526 keys - 1 items

Disco Beat Down Hellmet - 26.033 keys - 1 items

Frightened Poltergeist Wandering Wraith - 0.0 keys - 1 items

Haunted Ghosts Chieftain's Challenge - 27.035 keys - 1 items

Hot Specialized Killstreak Brick House Minigun (Field-Tested) - 24.531 keys - 1 items

Massed Flies Rebel Rouser - 12.516 keys - 1 items

Miami Nights Toy Tailor - 9.262 keys - 1 items

Neutron Star Pom-Pommed Provocateur - 16.521 keys - 1 items

Shimmering Fireworks Lawnmaker - 0.0 keys - 1 items

Snowfallen Smissmas Saxton - 150.192 keys - 1 items

Specialized Killstreak Spectrum Splattered Minigun (Field-Tested) - 2.711 keys - 1 items

Strange Festivized Killstreak Airwolf Sniper Rifle (Minimal Wear) - 7.298 keys - 1 items

Strange Green Energy Thousand-Yard Stare - 0.0 keys - 1 items

Strange Hickory Hole-Puncher Pistol (Field-Tested) - 3.207 keys - 1 items

Strange Kringle Collection - 7.009 keys - 1 items

Strange Specialized Killstreak Degreaser - 1.468 keys - 1 items

Strange Verdatica Sophisticated Smoker - 155.198 keys - 1 items

Sunbeams Panisher - 0.0 keys - 1 items

Terror-Watt Little Buddy - 10.013 keys - 1 items

Vicious Circle Vampire Vanquisher - 20.026 keys - 1 items

[Removed]:

[Sum added]: 526.5880000000001 keys

[Sum removed]: 0 keys

[Transaction #1]:

https://backpack.tf/profiles/76561198820238917#!/compare/1666828800/1666915200

https://backpack.tf/profiles/76561197962261994#!/compare/1666828800/1666915200

Checking for common item ids on both sides of transaction:

[Added]:

Cloud 9 Handyman's Handle - 18.023 keys - 1 items

Contagious Eruption Undercover Brolly - 0.0 keys - 1 items

Cool Kiln and Conquer Rocket Launcher (Battle Scarred) - 0.0 keys - 1 items

Dead Presidents Heer's Helmet - 15.019 keys - 1 items

Disco Beat Down Détective Noir - 20.526 keys - 1 items

Disco Beat Down Hellmet - 26.033 keys - 1 items

Haunted Ghosts Chieftain's Challenge - 27.035 keys - 1 items

Hot Specialized Killstreak Brick House Minigun (Field-Tested) - 24.531 keys - 1 items

Massed Flies Rebel Rouser - 12.516 keys - 1 items

Miami Nights Toy Tailor - 9.262 keys - 1 items

Neutron Star Pom-Pommed Provocateur - 16.521 keys - 1 items

Shimmering Fireworks Lawnmaker - 0.0 keys - 1 items

Snowfallen Smissmas Saxton - 150.192 keys - 1 items

Specialized Killstreak Spectrum Splattered Minigun (Field-Tested) - 2.711 keys - 1 items

Strange Festivized Killstreak Airwolf Sniper Rifle (Minimal Wear) - 7.298 keys - 1 items

Strange Green Energy Thousand-Yard Stare - 0.0 keys - 1 items

Strange Hickory Hole-Puncher Pistol (Field-Tested) - 3.207 keys - 1 items

Strange Kringle Collection - 7.009 keys - 1 items

Strange Specialized Killstreak Degreaser - 1.468 keys - 1 items

Strange Verdatica Sophisticated Smoker - 155.198 keys - 1 items

Sunbeams Panisher - 0.0 keys - 1 items

Terror-Watt Little Buddy - 10.013 keys - 1 items

Vicious Circle Vampire Vanquisher - 20.026 keys - 1 items

[Removed]:

[Sum added]: 526.5880000000001 keys

[Sum removed]: 0 keys

[Transaction #2]:

https://backpack.tf/profiles/76561197962261994#!/compare/1666656000/1666742400

https://backpack.tf/profiles/76561198045385097#!/compare/1666483200/1666656000

Checking for common item ids on both sides of transaction:

[Added]:

Disco Beat Down Hellmet - 26.033 keys - 1 items

Mann Co. Supply Crate Key - 1.0 keys - 10 items

[Removed]:

Strange Resonation Thousand-Yard Stare - 0.0 keys - 1 items

[Sum added]: 36.033 keys

[Sum removed]: 0.0 keys

[Transaction #3]:

https://backpack.tf/profiles/76561198045385097#!/compare/1665792000/1666483200

https://backpack.tf/profiles/76561198163549413#!/compare/1666396800/1666742400

Checking for common item ids on both sides of transaction:

[Added]:

Disco Beat Down Hellmet - 26.033 keys - 1 items

[Removed]:

[Sum added]: 26.033 keys

[Sum removed]: 0 keys

[Transaction #4]:

https://backpack.tf/profiles/76561198163549413#!/compare/1665187200/1665792000

https://backpack.tf/profiles/76561198058949058#!/compare/1665187200/1665273600

Checking for common item ids on both sides of transaction:

[Added]:

Disco Beat Down Hellmet - 26.033 keys - 1 items

[Removed]:

Mann Co. Supply Crate Key - 1 keys - 14 items

[Sum added]: 26.033 keys

[Sum removed]: 14 keys

What makes sale 1 untraceable? If you see 48 Keys, then treat the sale as 48 Keys.

Sale 3's also not untraceable - it was the Hellmet + 10 Keys for the Thousand-Yard Stare. That should be used there since the Stare has no other sales.

Since 48 was below buy orders at the time, it should still be excluded, but keep that in mind for the future.