Oh well

https://backpack.tf/item/1087551915

Sale 1

https://marketplace.tf/items/tf2/378;5;u18

$149.99 / $1.68 = 89.28 keys

Sale 2

https://backpack.tf/profiles/76561198062449384#!/compare/1585440000/1585526400

https://backpack.tf/profiles/76561199005803152#!/compare/1585440000/1585526400

Untraceable

Sale 3

https://backpack.tf/profiles/76561199005803152#!/compare/1585526400/1585612800

https://backpack.tf/profiles/76561198066415535#!/compare/1585526400/1586131200

Sold for 73 keys, 52 ref and The Ebenezer

Totalling to 73.5 keys

Took 2.5 hours

https://backpack.tf/item/927517722

Sale 4

https://backpack.tf/profiles/76561198160856661#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198079244935#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198821294885#!/compare/1585008000/1585094400

Okay...

So what I think happened here is that

The PE Muffs and 20 keys sold for the Cmoon Bicorne, which then sold alongside 10 keys for the CPS TC?

74 + 10 = 84

Sale 5

https://backpack.tf/profiles/76561198079244935#!/compare/1585785600/1585958400

https://backpack.tf/profiles/76561198304302520#!/compare/1585872000/1585958400

Sold for 65 keys

Sales

90, 74, 84, 65

Seeing as 99 is current seller, 90 seems too high

65 is too low

Taking 74 - 84