Item 1

https://backpack.tf/item/11685989346

Sale 1

https://backpack.tf/profiles/76561199197624825#!/compare/1684627200/1684713600

https://backpack.tf/profiles/76561199111292616#!/compare/1685145600/1685232000

Can't find buyer compares, untrace anyways

Sale 2

https://backpack.tf/profiles/76561199111292616#!/compare/1685145600/1685232000

https://backpack.tf/profiles/76561199026390261#!/compare/1685232000/1685318400

Untrace on seller side

Sale 2

https://backpack.tf/profiles/76561199026390261#!/compare/1685318400/1685404800

https://backpack.tf/profiles/76561199226663877#!/compare/1681776000/1685923200

Can only match a single key

Item 2

https://backpack.tf/item/10650547645

Sale 3

https://backpack.tf/profiles/76561199026390261#!/compare/1690416000/1690502400

https://backpack.tf/profiles/76561197974125477#!/compare/1690934400/1691712000

Might be a missing history here?

Item 3

https://backpack.tf/item/8303573326

Sale 4

https://backpack.tf/profiles/76561199084784906#!/compare/1688428800/1688515200

https://backpack.tf/profiles/76561199248924254#!/compare/1688342400/1688601600

13 keys?

Sale 5

https://backpack.tf/profiles/76561199248924254#!/compare/1688342400/1688601600

https://backpack.tf/profiles/76561198983856237#!/compare/1689379200/1690502400

No clue, can't load seller inv

Item 4

https://backpack.tf/item/7108977799

Sale 6

https://backpack.tf/profiles/76561198337734785#!/compare/1687737600/1687824000

https://backpack.tf/profiles/76561198203778081#!/compare/1687392000/1687910400

No clue

Sale 7

https://backpack.tf/profiles/76561198203778081#!/compare/1687910400/1688428800

https://backpack.tf/profiles/76561198195730175#!/compare/1687910400/1687996800

Untrace on buyer side

Sale 8

https://backpack.tf/profiles/76561198195730175#!/compare/1687910400/1687996800

https://backpack.tf/profiles/76561199245733895#!/compare/1687824000/1687910400

Untrace on seller side

Sale 9

https://backpack.tf/profiles/76561199245733895#!/compare/1687910400/1687996800

https://backpack.tf/profiles/76561198841365001#!/compare/1687910400/1687996800

No clue

Nothing else in this history is usable

Item 5

https://backpack.tf/item/6951201680

Ignoring qs.store bot transfers....

Sale 10

https://backpack.tf/profiles/76561198850121720#!/compare/1687564800/1687651200

https://backpack.tf/profiles/76561198203778081#!/compare/1687392000/1687910400

No clue

Sale 11

https://backpack.tf/profiles/76561198203778081#!/compare/1687910400/1688428800

https://backpack.tf/profiles/76561199134904484#!/compare/1687824000/1687910400

I can match a Boundless Blizzard Taunt: Rock, Paper, Scissors on buyer side, but not too sure here

Sale 12

https://backpack.tf/profiles/76561199134904484#!/compare/1687910400/1687996800

https://backpack.tf/profiles/76561199245733895#!/compare/1687910400/1687996800

Untrace on buyer side

Sale 13

https://backpack.tf/profiles/76561199245733895#!/compare/1687910400/1687996800

https://backpack.tf/profiles/76561198841365001#!/compare/1687910400/1687996800

No clue

Nothing else in this history is usable

Item 6

https://backpack.tf/item/4349381053

Sale 14

https://backpack.tf/profiles/76561198400344384#!/compare/1682035200/1688169600

https://backpack.tf/profiles/76561199110809353#!/compare/1691020800/1691107200

Can't load seller inv

Item 7

https://backpack.tf/item/4235885683

Sale 15

https://backpack.tf/profiles/76561198155110999#!/compare/1685318400/1685404800

https://backpack.tf/profiles/76561198079996881#!/compare/1685404800/1686096000

Can't match keys, no clue

Sale 16 - Untraceable history atm

https://gyazo.com/b82d54789fdc3223fc2845d4e266d00c

Bulk for a Sulphurous Coldsnap Cap

Mp.tf

https://marketplace.tf/items/tf2/30658;5;u98

$29.99 / $2.01 = ~15 keys (May 21)

$29.99 / $1.99 = ~15 keys (Jun 2)

$29.99 / $1.99 = ~15 keys (Jun 3)

$29.99 / $1.98 = ~15 keys (Jul 3)

2 @ $29.99 / 1.95 = ~15 keys (Jul 11)

$29.99 / $1.96 = ~15 keys (Jul 15)

$29.99 / $1.97 = ~15 keys (Jul 18)

$34.99 / $1.95 = ~18 keys (Jul 31)

$29.95 / $2.00 = ~15 keys (Aug 8)

Total Sales

13, 9x 15, 18

https://imgur.com/a/Su2O6oi

Many sales at 15, so that should definitely be included despite lower sellers

18 is too high

Running with 13 - 15 keys c: