https://backpack.tf/item/264352787 - Your item history

66 Keys + Max's Severed Head → 99.5 → Rounds to 100 Keys

https://backpack.tf/profiles/76561198054270952#!/compare/1722729600/1722816000

https://backpack.tf/profiles/76561198045346313#!/compare/1722729600/1722816000

https://backpack.tf/suggestion/66b3c4adc84778b1a5067b18 - Most recently accepted Max's Severed Head suggestion @ 33.5

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https://backpack.tf/item/274269522

Skipping Tradeback

Untraceable

https://backpack.tf/profiles/76561198069074737#!/compare/1717459200/1719100800

https://backpack.tf/profiles/76561198848879603#!/compare/1718582400/1718755200

Sold for 85 Keys

https://backpack.tf/profiles/76561198848879603#!/compare/1720137600/1720224000

https://backpack.tf/profiles/76561198027857565#!/compare/1719014400/1720310400

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https://backpack.tf/item/406168749 - duped history

https://marketplace.tf/items/tf2/52;5;u10

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

$125/$1.64 = ~76 Keys (Jun 23)

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https://imgur.com/4yTdMWl - current classifieds

Sellers @ 120 Key; $199.99

Buyers @ ~77 Keys

The marketplace sale can be excluded due to buyers; I would resuggest with a range of 85 - 100 Keys