Item 1: https://backpack.tf/item/11337674431

Sale 1: STN dump

https://backpack.tf/profiles/76561198083580981#!/compare/1759276800/1759881600

https://backpack.tf/profiles/76561199581722058#!/compare/1759708800/1759795200

Sale 2: STN pickup for 45 keys

https://backpack.tf/profiles/76561199581722058#!/compare/1760572800/1760659200

https://backpack.tf/profiles/76561198133712839#!/compare/1760486400/1761004800

Item 2: https://backpack.tf/item/7956726304

Sale 1: STN pickup for 44 keys, minus 14.77 ref

https://backpack.tf/profiles/76561199581722058#!/compare/1758931200/1759017600

https://backpack.tf/profiles/76561198205939253#!/compare/1758931200/1759017600

Key price at the time was 57.72 midpoint, so 43 keys and 42.92~ ref, or 43.74k for Sale 1

Sale 2: Bot dump

https://backpack.tf/profiles/76561198205939253#!/compare/1759276800/1759363200

https://backpack.tf/profiles/76561198453530349#!/compare/1759276800/1759363200

Sale 3: Untrace, no keys outgoing from buyer and none incoming have history

https://backpack.tf/profiles/76561198453530349#!/compare/1761004800/1761091200

https://backpack.tf/profiles/76561198062074818#!/compare/1761004800/1761091200

Item 3: https://backpack.tf/item/6803950572

Sale 1: Bulk

https://backpack.tf/profiles/76561199620388738#!/compare/1764720000/1764806400

https://backpack.tf/profiles/76561198044162402#!/compare/1764633600/1764806400

Item 4: https://backpack.tf/item/1991267876

Sale 1: Bot dump

https://backpack.tf/profiles/76561198102462417#!/compare/1758499200/1758844800

https://backpack.tf/profiles/76561199389274250#!/compare/1758758400/1758844800

Sale 2: Bot redumps

https://backpack.tf/profiles/76561199389274250#!/compare/1758844800/1758931200

https://backpack.tf/profiles/76561199072654974#!/compare/1758844800/1758931200

Marketplace sale:

https://marketplace.tf/items/tf2/400;5;u62

Nov 26th, $99.99

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

Key price for the day is $1.80

$99.99 / $1.80 = 55.55k

This is over current listed prices, as well as an outlier from the other two sales, so excluding.

Classifieds link: https://imgur.com/a/VoYeOWj

Sales at 43.74k and 45k, gives us a nice little range. Rounding 43.74k up to 44k for the low end, and taking 45k for the high end.