Sale 1:

https://backpack.tf/profiles/76561198192023081#!/compare/1584144000/1584230400

https://backpack.tf/profiles/76561198125702540#!/compare/1584144000/1584230400

https://backpack.tf/profiles/76561198259653343#!/compare/1584144000/1584230400

Sold for 8.24 keys (keys used to buy Bubble Pipe)

Sale 2:

https://backpack.tf/profiles/76561198337734785#!/compare/1578182400/1578268800

https://backpack.tf/profiles/76561198387797484#!/compare/1578009600/1578355200

Keys

Sale 3:

https://backpack.tf/profiles/76561198387797484#!/compare/1578355200/1578960000

https://backpack.tf/profiles/76561198011732976#!/compare/1577577600/1578614400

SCM?

Sale 4:

https://backpack.tf/profiles/76561198069666994#!/compare/1577318400/1578355200

https://backpack.tf/profiles/76561198876179362#!/compare/1577491200/1577664000

https://backpack.tf/profiles/76561198877068915#!/compare/1572912000/1577750400

https://backpack.tf/profiles/76561198877064597#!/compare/1574380800/1577750400

Untrace / bulk / Scammer

Sale 5:

https://backpack.tf/profiles/76561198335791307#!/compare/1583798400/1583884800

https://backpack.tf/profiles/76561198353677528#!/compare/1583884800/1583971200

Sold for 11 keys

Sale 6:

https://backpack.tf/profiles/76561198353677528#!/compare/1584403200/1584489600

https://backpack.tf/profiles/76561198841279602#!/compare/1584316800/1584403200

QS less than a week after Sale 5

Sale 7:

https://backpack.tf/profiles/76561198841279602#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198869276865#!/compare/1584403200/1584489600

Sold for ~9.39 keys

Sale 8:

https://backpack.tf/profiles/76561198152553866#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561197993422884#!/compare/1580774400/1580860800

Bulky

sale 9:

https://backpack.tf/profiles/76561198058623792#!/compare/1579478400/1579910400

https://backpack.tf/profiles/76561198341815489#!/compare/1579910400/1579996800

https://backpack.tf/profiles/76561198088565632#!/compare/1579910400/1579996800

Keys, cannot trace an accurate amount.

Sale 10:

https://backpack.tf/profiles/76561198188639765#!/compare/1578096000/1578441600

https://backpack.tf/profiles/76561198383339557#!/compare/1577318400/1578355200

Untrace

Sale 11:

https://backpack.tf/profiles/76561198383339557#!/compare/1583193600/1583366400

https://backpack.tf/profiles/76561198223429284#!/compare/1583193600/1583366400

Bulk

Sale 12:

https://backpack.tf/profiles/76561198223429284#!/compare/1583539200/1583712000

https://backpack.tf/profiles/76561198850274253#!/compare/1583539200/1583712000

QS

sale 13 - 16:

https://marketplace.tf/items/tf2/383;5;u60

$18 / $1.75 = 10.29 keys <--- https://backpack.tf/item/7956713149

$19.33 / $1.77 = 10.92 keys

$19.33 / $1.79 = 10.80 keys

$17.95 / $1.75 = 10.26 keys

Total sales @:

8.24, 9.39, 10.26, 10.29, 10.80, 10.92, 11 keys

Buyers up to ~8.5 keys,

seller for ~9.5 keys,

taking 9 - 11 keys.