Since you didn't link it, the bot sale in item 1 isn't traceable.

https://backpack.tf/profiles/76561198053811988#!/compare/1701216000/1701302400

The histories don't match the 52 Keys in sale 2, so more evidence will be needed to confirm that sale.

You missed a sale between sales 3 and 4.

https://backpack.tf/profiles/76561198078678953#!/compare/1701561600/1701820800 - The 4 Unusuals shown here + 4 Keys

https://backpack.tf/profiles/76561198173379387#!/compare/1701734400/1701820800 - They were each quicksold for a total of 61 Keys

https://gladiator.tf/sales?item=Devilish%20Diablo%20Hat%20Outta%20Hell&at=2023-12-23T19:38:00.505Z - Sale 4 was 52 Keys

That means it went sale 3 (75) -> 61 -> sale 4 (52). If 75 isn't considered usable, then why is it being used in the range here?

https://next.backpack.tf/classifieds/snapshots/Devilish%20Diablo%20Hat%20Outta%20Hell/657173d874086ae86202817a - Sale 7 was listed for ~62 Keys

This also makes 75 seem high with all of the lower stuff.

The Nether Void Schadenfreude in sale 8 matches, but I hope more was involved.

https://backpack.tf/profiles/76561198055421322#!/compare/1701734400/1701820800 - The Medi Gun seen in sale 10 sold for 48 Keys

Sale 10 is then 57 Keys with the 9 you can see in the seller's compare.

Sale 12 was the Sunbeams Practitioner + the Hat Outta Hell for the Scorching Brass Bucket, but that sale won't be usable here.

The Sunbeams Brim of Fire is outdated and has recent sales, so why was a mini not made? It has 3 recent traceable sales.

https://backpack.tf/profiles/76561198377865437#!/compare/1696204800/1696291200 - Haven't counted the Keys

https://backpack.tf/profiles/76561198189451937#!/compare/1696982400/1697414400 - Haven't counted the Keys

https://backpack.tf/profiles/76561198393480198#!/compare/1697500800/1697846400 - 58 Keys

You missed a sale between sales 15 and 16, but it isn't traceable.

https://backpack.tf/profiles/76561198218497692#!/compare/1696636800/1696723200

Your seller compare link in sale 16 is wrong and misses the sale entirely.

https://backpack.tf/profiles/76561199502156612#!/compare/1697932800/1698019200 - 32 Keys + Fireflies Brothers in Blues + Cyclone Yeti Smash

Keys on the buyer's side can be traced and counted in sale 17. I have a feeling not all of the Keys are showing, but you'll need confirmation of that.

The Burning Roman has more sales that you didn't count here as seen in the suggestion made for it. However, that sale should be used for the Roman.

https://backpack.tf/suggestion/658f088361196141390ad4d5

The sale on this history was also missed - https://backpack.tf/item/10760895468

https://backpack.tf/profiles/76561199111648936#!/compare/1698537600/1698624000 - 58 Keys

I agree 75 shouldn't be part of the range because of the dump-off in value. The Brim of Fire will need to be looked into further, as will sales 2, 16, and 17.

Too much is wrong here, so this will be closed.