I hit crtl + w at the end when re-typing this....

Item 1

https://backpack.tf/item/12487778320

Sale 1

https://backpack.tf/profiles/76561197971174166#!/compare/1672272000/1672444800

https://backpack.tf/profiles/76561198196622954#!/compare/1672358400/1672444800

10 keys

Item 2

https://backpack.tf/item/12423719980

Sale 2

https://backpack.tf/profiles/76561198151686784#!/compare/1671235200/1671667200

https://backpack.tf/profiles/76561198261483133#!/compare/1671321600/1671408000

Sold for a Mysterious Mixture Taunt: The Fist Bump + ~22 ref in adds

Mini for Fist Bump

~9 keys

Sale 3

https://backpack.tf/profiles/76561198261483133#!/compare/1671408000/1671494400

https://backpack.tf/profiles/76561198196622954#!/compare/1671408000/1671494400

~18 keys

Item 2

https://backpack.tf/item/12418443754

Sale 4

https://backpack.tf/profiles/76561198074422721#!/compare/1671408000/1671494400

https://backpack.tf/profiles/76561198196622954#!/compare/1671408000/1671494400

18 keys

Sale 5

https://backpack.tf/profiles/76561198196622954#!/compare/1671494400/1671580800

https://backpack.tf/profiles/76561198028508165#!/compare/1671494400/1671667200

Bulk for a Musical Maelstrom Patriot Peak, using there

Sale 6

https://backpack.tf/profiles/76561198028508165#!/compare/1671667200/1672790400

https://backpack.tf/profiles/76561199004277175#!/compare/1671580800/1671753600

Aces High Executioner never loads into the seller's inventory

Mini for Exe

~15 keys

Sale 7

https://backpack.tf/profiles/76561199004277175#!/compare/1671753600/1672012800

https://backpack.tf/profiles/76561198254861074#!/compare/1671840000/1671926400

Sold for a Vivid Plasma Human Cannonball for the Tainted Frost Throttlehead + 4 keys

This won't be usable unfortunately as the only valid sale I could find for the human cannonball was this seller dumping it to a bot

Sale 8

https://backpack.tf/profiles/76561198254861074#!/compare/1671926400/1672012800

https://backpack.tf/profiles/76561197968968337#!/compare/1671753600/1671926400

Can't find the sale on the buyer's side

Mp.tf

https://marketplace.tf/items/tf2/31282;5;u277

https://manic.tf/keyprice/?at=2023-01-28&price=39.99

~20 keys

Bunch of other sales, courtesy of FishCrimes

Sale 9

https://backpack.tf/profiles/76561197968968337#!/compare/1674604800/1674691200

https://backpack.tf/profiles/76561198346706646#!/compare/1674691200/1674777600

Looks to have been 1:1'd for an iso ft health flamer

Sale 10

https://backpack.tf/profiles/76561198232041512#!/compare/1673308800/1673395200

https://backpack.tf/profiles/76561198145331385#!/compare/1673308800/1673481600

Looks to have been gambled

Sale 11

https://backpack.tf/profiles/76561198145331385#!/compare/1674000000/1674259200

https://backpack.tf/profiles/76561198265019348#!/compare/1674000000/1674086400

Sale 12

https://backpack.tf/profiles/76561198265019348#!/compare/1674086400/1674518400

https://backpack.tf/profiles/76561198405570201#!/compare/1674086400/1674691200

Untrace

Sale 13

https://backpack.tf/profiles/76561198405570201#!/compare/1673481600/1674086400

https://backpack.tf/profiles/76561198308110981#!/compare/1674086400/1674172800

Bulk for a sf boxcar

Sale 14

https://backpack.tf/profiles/76561198248511368#!/compare/1674864000/1674950400

https://backpack.tf/profiles/76561198274767027#!/compare/1674950400/1675036800

Sold in bulk for keys

Sale 15

https://backpack.tf/profiles/76561198149217307#!/compare/1675123200/1675209600

https://backpack.tf/profiles/76561198311498888#!/compare/1675123200/1675209600

~12 keys

Sale 16

https://backpack.tf/profiles/76561198078864424#!/compare/1676678400/1676764800

https://backpack.tf/profiles/76561198087187826#!/compare/1676678400/1676851200

Untraceable

Total Sales

9, 10, 12, 15, 18, 18, 20

Taking 12 - 18 keys as per FishCrime's comment c: