4 years

Item 1

https://backpack.tf/item/7956176495

Sale 1

All untrace, mising people

Item 2

https://backpack.tf/item/7955743426

Sale 2

https://backpack.tf/profiles/76561199101442624#!/compare/1609718400/1609804800

https://backpack.tf/profiles/76561198151158792#!/compare/1609804800/1611273600

Untrace

Sale 3

https://backpack.tf/profiles/76561198151158792#!/compare/1588723200/1609804800

https://backpack.tf/profiles/76561198350879574#!/compare/1609718400/1609804800

Untrace

Sale 4

https://backpack.tf/profiles/76561198350879574#!/compare/1609804800/1609891200

https://backpack.tf/profiles/76561198364349088#!/compare/1609804800/1609891200

Untrace

Sale 5

https://backpack.tf/profiles/76561198364349088#!/compare/1609891200/1609977600

https://backpack.tf/profiles/76561199112183845#!/compare/1609891200/1609891200

Untrace

Sale 6

https://backpack.tf/profiles/76561199112183845#!/compare/1609891200/1609891200

https://backpack.tf/profiles/76561198158700523#!/compare/1603843200/1609977600

Untrace

Sale 7

https://backpack.tf/profiles/76561198158700523#!/compare/1609977600/1610409600

https://backpack.tf/profiles/76561198157675496#!/compare/1606089600/1610496000

Untrace

Sale 8

Excluding tradeit

Sale 9

https://backpack.tf/profiles/76561198074043822#!/compare/1611792000/1611878400

https://backpack.tf/profiles/76561198030058573#!/compare/1611792000/1611878400

Untrace

Sale 10

https://backpack.tf/profiles/76561198030058573#!/compare/1611792000/1611878400

https://backpack.tf/profiles/76561198879945899#!/compare/1611792000/1611878400

7 keys match

https://gladiator.tf/listings/6013ac8ad4feab5c8fa27a65 - buy order 6 keys 51.22 ref

Taking as 7 keys

Item 3

https://backpack.tf/item/7957231569

Sale 11

Excluding cstrade

Sale 12

https://backpack.tf/profiles/76561198850274253#!/compare/1612483200/1612569600

https://backpack.tf/profiles/76561198871959036#!/compare/1612483200/1612569600

Untrace

Sale 13

https://backpack.tf/profiles/76561198871959036#!/compare/1612483200/1612569600

https://backpack.tf/profiles/76561198296809260#!/compare/1612483200/1612569600

Untrace

Sale 14

https://backpack.tf/profiles/76561198296809260#!/compare/1612569600/1612656000

https://backpack.tf/profiles/76561199088995056#!/compare/1612569600/1612656000

Untrace

Sale 15

https://backpack.tf/profiles/76561199088995056#!/compare/1613174400/1613260800

https://backpack.tf/profiles/76561198115509750#!/compare/1613088000/1613174400

Untrace

Sale 16

https://backpack.tf/profiles/76561198115509750#!/compare/1613174400/1613260800

https://backpack.tf/profiles/76561198075045529#!/compare/1613520000/1614038400

Untrace

Sale 17

https://backpack.tf/profiles/76561198075045529#!/compare/1614124800/1614211200

https://backpack.tf/profiles/76561198034775190#!/compare/1614124800/1614211200

Bulk for Roboactive Noble Amassment of Hats

Sale 18

https://backpack.tf/profiles/76561198034775190#!/compare/1614297600/1614384000

https://backpack.tf/profiles/76561198337734785#!/compare/1614211200/1614297600

Sold for 8 keys 30 ref

https://gladiator.tf/listings/60397f9a3beabe8b30353cb7 - buy order 8 keys 29.22 ref

Taking 8.5 keys

Sale 19

https://backpack.tf/profiles/76561198337734785#!/compare/1615766400/1615852800

https://backpack.tf/profiles/76561198080179568#!/compare/1615766400/1615852800

Sold for 6 keys 27 ref

https://gladiator.tf/listings/605125e836096748b3e24b35 - buy order was 7 keys 27 ref lol

Taking as 7.5 keys

Marketplace sales

https://marketplace.tf/items/tf2/330;5;u57

Dec 22nd - $14.99 / $2.04 = 7.35 keys

Mar 20th - $19.99 / $2.19 = 9.13 keys

Sales

7, 8.5, 7.5, 7.5, 9

Taking 7 - 9 keys here