Item 1

https://backpack.tf/item/12515328684

Ignoring all the gambling / covering mp.tf at the end...

Item 2

https://backpack.tf/item/12408716582

This is just gambling

Item 3

https://backpack.tf/item/11111333445

Sale 1

https://backpack.tf/profiles/76561199014485372#!/compare/1683763200/1683936000

https://backpack.tf/profiles/76561198850274253#!/compare/1683763200/1683849600

Looks like ~22 keys

Item 4

https://backpack.tf/item/5207719678

Sale 2

https://backpack.tf/profiles/76561198251704884#!/compare/1681084800/1681171200

https://backpack.tf/profiles/76561199101376092#!/compare/1680652800/1681344000

No clue

Ignoring all that gambling....

Sale 3

https://backpack.tf/profiles/76561199245733895#!/compare/1686355200/1686441600

https://backpack.tf/profiles/76561198972582303#!/compare/1686268800/1686441600

No clue

Item 5

https://backpack.tf/item/10111304579

Sale 4

https://imgur.com/a/osHIrep

~28 keys

Mp.tf

https://marketplace.tf/items/tf2/1172;5;u3112

$79.99 / $2.02 = ~40 keys (May 10)

Total Sales

22, 28, 40

https://imgur.com/a/koqByMY

22 is under buyers / was a buyer dump

40 seems high, unsold @~34 for a wk

Taking 28 keys c: