Item 1

https://backpack.tf/item/7864202615

This is likely the Jun 21 sale on mp.tf I'll make a note to exclude that at the end

Item 2

https://backpack.tf/item/9417604889

Sale 1

https://backpack.tf/profiles/76561198060361977#!/compare/1686355200/1686528000

https://backpack.tf/profiles/76561198850178158#!/compare/1686268800/1686355200

Likely dumped to afford the Horsemann's Hack Firearm Protector

Item 3

https://backpack.tf/item/9359696639

Covering mp.tf at the end

Item 4

https://backpack.tf/item/9330882668

Covering mp.tf at the end

Mp.tf

https://marketplace.tf/items/tf2/30917;5;u3041

$6.99 / $2.03 = ~3.45 keys (May 15)

$6.99 / $2.02 = ~3.45 keys (May 20)

$6.50 / $2.00 = ~3.25 keys (Jun 21) - This was dumped to STN

$6.50 / $1.96 = ~3.30 keys (Jul 20)

Total Sales

3.25, 3.30, 3.45, 3.45

https://imgur.com/a/xgEazph

3.25 likely dumped for less

Taking 3.30 - 3.45 keys c: