4 years

https://backpack.tf/item/14734872117

Sale #1:

https://backpack.tf/profiles/76561197998883721#!/compare/1722384000/1722470400 ~ 14 keys pure matches uses near id

https://backpack.tf/profiles/76561199110809353#!/compare/1722384000/1722470400 ~ cant trace

Way under buyers at 22

Sale #2:

https://backpack.tf/profiles/76561198188093413#!/compare/1717632000/1717718400 ~ ? is lucas arthurs bot?

https://backpack.tf/profiles/76561199059800460#!/compare/1717632000/1717718400

Sale #3:

https://backpack.tf/profiles/76561199059800460#!/compare/1717891200/1717977600 ~ 32 keys + Natural Lights Covert Covers matches... the bots b/o was 39

https://backpack.tf/profiles/76561198845745433#!/compare/1717977600/1718582400

Mini covert:

https://backpack.tf/profiles/76561198311498888#!/compare/1716595200/1716681600 ~ 13 keys match using nearID 14513482130 from https://backpack.tf/item/13910398450

= 45 keys. Would cap at 39.

Sale #4:

https://backpack.tf/item/9478907173

https://backpack.tf/profiles/76561199183171982#!/compare/1723161600/1723248000 ~ 20 keys + 0.77 ref, below current buyers

https://backpack.tf/profiles/76561199110809353#!/compare/1723161600/1723248000

Sale #5:

https://backpack.tf/profiles/76561198251960730#!/compare/1722988800/1723075200 ~ bulk

https://backpack.tf/profiles/76561199235704407#!/compare/1722988800/1723075200

Sale #6:

https://backpack.tf/profiles/76561199581722058#!/compare/1722211200/1722297600 ~ 4 keys match

https://backpack.tf/profiles/76561198251960730#!/compare/1722211200/1722297600 ~ ?

Sale #7:

https://backpack.tf/profiles/76561198169458269#!/compare/1720310400/1720396800 ~ 14 keys + about 1 key in ref matches, still below buyers tho

https://backpack.tf/profiles/76561199581722058#!/compare/1720310400/1720396800

Sale #8:

https://backpack.tf/profiles/76561198341800900#!/compare/1717372800/1717459200 ~ 15 keys pure... still below buyers... ?? buyers must have only come on recently since all these sales seem to be below

Sale #9:

https://backpack.tf/profiles/76561199064200732#!/compare/1716163200/1716249600 ~ no matches

https://backpack.tf/profiles/76561198341800900#!/compare/1716249600/1716336000 ~ all keys match so 33 keys.