Sold for 376 Keys + Specialized Killstreak Australium Stickybomb Launcher (22):

https://backpack.tf/profiles/76561198127717925#!/compare/1742774400/1742947200 (seller)

https://backpack.tf/profiles/76561198431592904#!/compare/1742860800/1742947200 (buyer, untrace)

= 398, rounding to 400. Stickybomb was probably closer to 24 than 22 at the time anyways.

(Duped) Sold for 350 Keys:

https://backpack.tf/profiles/76561198977417516#!/compare/1741478400/1742342400 (seller)

https://backpack.tf/profiles/76561198879017688#!/compare/1742169600/1742256000 (buyer)

(Duped) (supportive, unusable) Sold for $649.99 on MannCo (~360 Keys with Keys at $1.81):

https://mannco.store/item/440-scorching-flames-unusual-samur-eye

(Duped) Sold with almost 300 Keys in other stuff for a Frostbite Lucky Shot:

https://backpack.tf/profiles/76561198879017688#!/compare/1745539200/1745625600 (seller)

https://backpack.tf/profiles/76561197981158247#!/compare/1745539200/1745625600 (buyer)

Lucky shot was priced with a single sale that is now out of date, this can probably be used to give it a range or replace it instead.

Usable sales at 350 (duped), 400. Unusable supportive sale at 360. Including the duped sale to give it a range and taking 350-400

Sold mine for a DBD Crone's + MG Festiviser (dumped for 142.5) + Max's (30.5) + 26 Keys:

https://imgur.com/vfa1aMP

https://backpack.tf/profiles/76561198150397334#!/compare/1747353600/1747526400

Crone's buy order alone puts this at 350, with a proper update it'd fall in the middle of the range.