Item 1

https://backpack.tf/item/3441627982

Sale 1

https://backpack.tf/profiles/76561199059160806#!/compare/1688947200/1689033600

https://backpack.tf/profiles/76561198272905874#!/compare/1689033600/1690416000

12 keys

Item 2

https://backpack.tf/item/8724089023

Sale 2

https://backpack.tf/profiles/76561198852631417#!/compare/1685404800/1685491200

https://backpack.tf/profiles/76561199085116273#!/compare/1685318400/1685404800

No clue

Sale 3

https://backpack.tf/profiles/76561199085116273#!/compare/1686096000/1686182400

https://backpack.tf/profiles/76561198133991629#!/compare/1685232000/1686355200

No clue

Sale 4

https://backpack.tf/profiles/76561198133991629#!/compare/1686528000/1687824000

https://backpack.tf/profiles/76561199059160806#!/compare/1687564800/1687737600

No clue

Sale 5

https://backpack.tf/profiles/76561199059160806#!/compare/1689552000/1689638400

https://backpack.tf/profiles/76561198979319783#!/compare/1688774400/1690243200

No clue

Item 3

https://backpack.tf/item/5949980984

Sale 6

https://backpack.tf/profiles/76561199059160806#!/compare/1683417600/1683504000

https://backpack.tf/profiles/76561198162073847#!/compare/1683763200/1685232000

No clue

Item 4

https://backpack.tf/item/12187323333

Sale 7

https://backpack.tf/profiles/76561199192607141#!/compare/1684281600/1684368000

https://backpack.tf/profiles/76561198272905874#!/compare/1675468800/1686787200

12 keys

Sale 8

https://backpack.tf/profiles/76561198272905874#!/compare/1688774400/1689033600

https://backpack.tf/profiles/76561198114402400#!/compare/1688947200/1689033600

Bulk for a Sulphurous Connoisseur's Cap

Item 5

https://backpack.tf/item/7581289454

Sale 9

https://backpack.tf/profiles/76561198014377623#!/compare/1684800000/1685232000

https://backpack.tf/profiles/76561198850274253#!/compare/1685145600/1685232000

No clue

Sale 10

https://backpack.tf/profiles/76561198850274253#!/compare/1685491200/1685577600

https://backpack.tf/profiles/76561198060596818#!/compare/1685577600/1685664000

No clue

Mp.tf

https://marketplace.tf/items/tf2/1106;5;u3097

$39.99 / $2.03 = ~20 keys (May 15)

$59.99 / $1.97 = ~30 keys (Jul 9)

Total Sales

12, 12, 20, 30

https://imgur.com/a/hif75gi

Mp.tf sales feel high with 20 being unsold for over a month now

Taking 12 keys flat c: