4 years!

Only history with movement: https://backpack.tf/item/9366282444

Sale #1:

https://backpack.tf/profiles/76561198115841780#!/compare/1727913600/1728000000 ~ 42 keys + 1 scrap match using nearID

https://backpack.tf/profiles/76561199564942025#!/compare/1727913600/1728000000

Sale #2:

https://backpack.tf/profiles/76561199564942025#!/compare/1731715200/1731801600 ~ 57 keys + 26.22 ref match using NearID

https://backpack.tf/profiles/76561198343273185#!/compare/1731715200/1731801600

Sale #3:

https://backpack.tf/profiles/76561198343273185#!/compare/1732579200/1732665600 ~ 1 key + 19.44 ref matches

https://backpack.tf/profiles/76561199581722058#!/compare/1732579200/1732492800

Sale #4:

https://backpack.tf/profiles/76561199581722058#!/compare/1733184000/1733270400 ~ 92 keys pure matches

https://backpack.tf/profiles/76561198316071886#!/compare/1733097600/1733184000 ~ bought 4 unusuals together

Taking 42-57.

I'm slightly reluctant to take 57 as it was most likely sold back to STN for less, but buyers are at 39.23 so 42 also feels low, but also the pyroland nightmare crit cloak I'm 99% sure (and the price is still there) sold for basically 45 keys when u account for the ref. Mods let me know what you think.