Item 1

https://backpack.tf/item/13046356838

Sale 1

https://backpack.tf/profiles/76561198105419594#!/compare/1684454400/1685491200

https://backpack.tf/profiles/76561198046027406#!/compare/1686355200/1686441600

Untrace on buyer side

Sale 2

https://backpack.tf/profiles/76561198046027406#!/compare/1686441600/1686528000

https://backpack.tf/profiles/76561198005032783#!/compare/1686009600/1686614400

No clue

Sale 3

https://backpack.tf/profiles/76561198005032783#!/compare/1686614400/1686700800

https://backpack.tf/profiles/76561198058508132#!/compare/1688342400/1690588800

Likely a missing history here?

Item 2

https://backpack.tf/item/12855524917

Sale 4

https://backpack.tf/profiles/76561198164814063#!/compare/1689984000/1690156800

https://backpack.tf/profiles/76561199245733895#!/compare/1690156800/1690243200

No clue

Sale 5

Listed on mannco.store?

Item 3

https://backpack.tf/item/12602729229

Sale 6

https://backpack.tf/profiles/76561199128560410#!/compare/1685145600/1685232000

https://backpack.tf/profiles/76561198983856237#!/compare/1685577600/1685750400

No clue

Item 4

https://backpack.tf/item/13279246685

Ignoring qs.bot transfers....

Sale 7

https://backpack.tf/profiles/76561199084784906#!/compare/1685145600/1685232000

https://backpack.tf/profiles/76561198445821214#!/compare/1685232000/1685318400

No clue

Sale 8

https://imgur.com/a/x6B9M0g

https://backpack.tf/profiles/76561199111073161#!/compare/1691712000/1691798400

Likely 12, I checked the 12 key bulk histories but couldn't find it....

Item 5

https://backpack.tf/item/13294424509

Sale 9

https://backpack.tf/profiles/76561198960059908#!/compare/1687996800/1688083200

https://backpack.tf/profiles/76561198283682411#!/compare/1690243200/1690416000

Can't load seller inv

Sale 10

https://imgur.com/a/xFKQntw

https://backpack.tf/profiles/76561198283682411#!/compare/1690761600/1690934400

Can't say for sure

Mp.tf

https://marketplace.tf/items/tf2/31329;5;u273

$29.95 / $1.98 = ~15 keys (Jul 6)

$29.95 / $1.95 = ~15 keys (Jul 12)

$28.95 / $1.98 = ~15 keys (Aug 4)

$28.95 / $2.00 = ~14 keys (Aug 7)

Total Sales

14, 15, 15, 15

https://imgur.com/a/HvlURMe

Taking 14 - 15 keys c: