Sale 1:

22 pure

https://backpack.tf/profiles/76561198160120451#!/compare/1541030400/1541116800

Excluding due to buyers: https://imgur.com/a/OV7H6r0

Sale 2:

Bulk

https://backpack.tf/profiles/76561198021055079#!/compare/1537056000/1537142400

https://backpack.tf/profiles/76561198198225870#!/compare/1537056000/1537142400

Sale 3:

Sold for Pro KS Aussie Scattergun (38)

https://backpack.tf/profiles/76561198021055079#!/compare/1538784000/1538870400

https://backpack.tf/profiles/76561198846276257#!/compare/1538784000/1539043200

Scatter: https://imgur.com/a/LScsBMe

Excluding due to unsold: https://imgur.com/a/z7fZFjh

Sale 4:

24 pure

https://backpack.tf/profiles/76561198179707937#!/compare/1539388800/1539475200

https://backpack.tf/profiles/76561198846276257#!/compare/1539043200/1539475200

Sale 5:

Either 29 pure or untrace, countered by unsolds anyway

https://backpack.tf/profiles/76561198179707937#!/compare/1540080000/1540166400

Sale 6:

https://marketplace.tf/items/451;5;u34

$69.99 / $1.87 = 37.43 keys

Excluding due to unsold: https://imgur.com/a/z7fZFjh

Sale 7:

https://marketplace.tf/items/451;5;u34

$30.3 / $1.87 = 16.20 keys

Excluding due to buyers: https://imgur.com/a/OV7H6r0

Only valid sale: 24 keys

Unsold being used to exclude is a dupe but: https://imgur.com/a/9nj6ad6