7 months

Sale #1:

https://backpack.tf/item/1346159794

https://marketplace.tf/items/tf2/339;5;u31 ~ $400 USD Oct 11 / 1.9 = 210.5 keys (211)

Sale #2:

https://backpack.tf/profiles/76561198072441047#!/compare/1729296000/1729382400 ~ 176 keys + some ref. Below buyers for any effect https://i.imgur.com/XCT0SR1.png

https://backpack.tf/profiles/76561198028138706#!/compare/1728000000/1729382400

Sale #3:

https://backpack.tf/item/4131282464

https://backpack.tf/profiles/76561198240217520#!/compare/1725840000/1726185600 ~ appears to have sold for a Scorching Flames Breach and Bomb which its sellers at 155 puts this below buyers of this hat

https://backpack.tf/profiles/76561199201124947#!/compare/1725926400/1726185600

Sale #4:

https://backpack.tf/profiles/76561198220098345#!/compare/1725235200/1725321600

https://backpack.tf/profiles/76561198240217520#!/compare/1725062400/1725321600 ~ sold for a burning flame defiant spartan (191) + max head (36) + 2 keys

= 229

Sales @ 211, 229

Taking