Credit to Shuffle Spy for the freebie :)

https://backpack.tf/item/7246310755

Sale 1) Sold for $349.99 (200 Keys) on 11/7

https://marketplace.tf/items/tf2/30546;5;u13

https://backpack.tf/item/8303760737

Sale 2) Sold for 165 Keys

https://backpack.tf/profiles/76561198084162984#!/compare/1703116800/1703376000

https://backpack.tf/item/7956921158

Sale 3) 215 Keys match, but that looks like multiple trades including the Ghosts Lucky Shot.

https://backpack.tf/profiles/76561199026390261#!/compare/1698969600/1699056000

https://backpack.tf/profiles/76561198107912266#!/compare/1698969600/1699056000

https://backpack.tf/profiles/76561198124904264#!/compare/1698969600/1699056000 - Lucky Shot buyer

Sale 4) Sold for a Burning Thousand-Yard Stare + Strange Pro KS 2x Spelled Rainblower

https://backpack.tf/profiles/76561198337378097#!/compare/1700611200/1700697600

Using for the Stare.

https://marketplace.tf/items/tf2/30546;5;u13 - Another sale at $349.99 (174 Keys)

This rounds to 175 Keys

200 Keys looks to be too high given the current sellers.

https://imgur.com/a/97V5Lep