Item 1

https://backpack.tf/item/13107925851

Sale 1

https://backpack.tf/profiles/76561199111073161#!/compare/1687392000/1687478400

https://backpack.tf/profiles/76561198841889772#!/compare/1687305600/1688083200

25 keys

Item 2

https://backpack.tf/item/13049726535

Sale 2

https://backpack.tf/profiles/76561198879017688#!/compare/1684972800/1685232000

https://backpack.tf/profiles/76561198850121720#!/compare/1684972800/1685059200

No clue

Sale 3

https://backpack.tf/profiles/76561198850121720#!/compare/1686960000/1687046400

https://backpack.tf/profiles/76561199134603763#!/compare/1686960000/1687046400

Can't say for sure here, can only match a handful of keys on buyer side

Sale 4

https://backpack.tf/profiles/76561199134603763#!/compare/1687737600/1687824000

https://backpack.tf/profiles/76561198001963208#!/compare/1687737600/1687824000

Can only match 11 keys, which seems incomplete

Sale 5

https://backpack.tf/profiles/76561198001963208#!/compare/1687996800/1688515200

https://backpack.tf/profiles/76561198168591227#!/compare/1688083200/1688342400

No clue

Sale 6

https://backpack.tf/profiles/76561198168591227#!/compare/1688342400/1688428800

https://backpack.tf/profiles/76561198311498888#!/compare/1688342400/1688428800

21 keys?

Sale 7

https://backpack.tf/profiles/76561198311498888#!/compare/1689897600/1690070400

https://backpack.tf/profiles/76561198431727711#!/compare/1650499200/1690675200

No clue

Sale 8

https://backpack.tf/profiles/76561198431727711#!/compare/1650499200/1690675200

https://backpack.tf/profiles/76561199161916038#!/compare/1690588800/1690761600

Can't load seller inv

Sale 9

https://backpack.tf/profiles/76561199161916038#!/compare/1690761600/1690848000

https://backpack.tf/profiles/76561198190085003#!/compare/1690070400/1691020800

No clue

Sale 10

https://backpack.tf/profiles/76561198190085003#!/compare/1690070400/1691020800

https://backpack.tf/profiles/76561198201364639#!/compare/1691020800/1691107200

Can't load seller inv

Item 3

https://backpack.tf/item/8677553869

Sale 11

https://backpack.tf/profiles/76561198144364323#!/compare/1672790400/1690934400

https://backpack.tf/profiles/76561198055552726#!/compare/1690934400/1691107200

Can't load seller inv

Mp.tf

https://marketplace.tf/items/tf2/538;5;u34

$54.99 / $1.99 = ~28 keys (May 29)

$54.99 / $1.98 = ~28 keys (Jun 9)

$53.99 / $1.99 = ~27 keys (Jul 4)

$53.99 / $1.95 = ~28 keys (Aug 2)

Total Sales

21, 25, 27, 28, 28, 28

https://imgur.com/a/DVotnzJ

21 was a STN dump

Taking 25 - 28 keys c: