Sale #1:

https://backpack.tf/item/16487745688

https://marketplace.tf/items/tf2/31578;5;u3007 ~ no sale

Judging by the dates and compares, this was unusualified

Sale #2:

https://backpack.tf/item/17182497895

https://backpack.tf/profiles/76561198251704884#!/compare/1784505600/1784592000 ~ 48 keys + 47 ref match

https://next.backpack.tf/profiles/76561198311498888/compare?from=1784505600&to=1784592000 ~ 108 keys seem to match on next, keys in the Near: 17284023131-17284023886 (108) match george

Sale #3;

https://backpack.tf/item/16923859760

https://backpack.tf/profiles/76561198273700921#!/compare/1782172800/1782259200 ~ 17 keys match

https://backpack.tf/profiles/76561198273700921#!/compare/1782172800/1782259200 ~ the Cryogenic Feathered Foe looks like a withdrawal so the total will be keys - what he paid for the Strange Psycho-Delic Crook's Cap

Which was: https://backpack.tf/profiles/76561199085751644#!/compare/1782172800/1782259200 ~ 18 keys

so 146 - 18 = 128 keys

Sale #4:

https://backpack.tf/item/16569096789 ~ Unusualified

Sale #5:

https://backpack.tf/profiles/76561198071082937#!/compare/1784246400/1784332800 ~ 115 keys (after buying for 128, Sale #3)

https://backpack.tf/profiles/76561199192607141#!/compare/1784246400/1784332800

Sale #6:

https://backpack.tf/item/16709519200

https://backpack.tf/profiles/76561198375483303#!/compare/1782172800/1782259200 ~ 91 keys + 15 ref

https://backpack.tf/profiles/76561199581722058#!/compare/1782086400/1782172800

Sale #7:

https://backpack.tf/profiles/76561198248298766#!/compare/1781222400/1781308800 ~ 120 keys

https://backpack.tf/profiles/76561198375483303#!/compare/1781222400/1781308800

Sale #8:

https://backpack.tf/profiles/76561199581722058#!/compare/1782172800/1782259200 ~ 106 keys + Malevolent Monoculi Firearm Protector (11) = 117

https://backpack.tf/profiles/76561198712860876#!/compare/1782086400/1782345600

Sale #9:

https://backpack.tf/profiles/76561198375483303#!/compare/1783123200/1783209600 ~ 115 keys + 13 metal

https://backpack.tf/profiles/76561199026390261#!/compare/1783209600/1783123200

Sales @ 91, 108, 115, 115, 117, 120, 128 (later sold for 115)

Buyers @ 90

Sellers @ 115

Image of classfieds: https://i.imgur.com/rDuUmGF.png