Other histories with in-date sales to check:

https://backpack.tf/item/205144334

https://backpack.tf/item/959626813

https://backpack.tf/item/959626813

https://backpack.tf/profiles/76561198251704884#!/compare/1775088000/1775260800

https://backpack.tf/profiles/76561198156992964#!/compare/1773273600/1775260800

Exo Strange Professional Killstreak Australium Sniper Rifle(Lets say just 300Keys https://gyazo.com/b3ecee7599f73a500cf748af315e1efe ) + Exo Strange Festivized Professional Killstreak Bazaar Bargain( 49keys https://gyazo.com/766af75cd8418c4f02ec4f90b6191550 )+ X2 Spelled Strange Villain's Veil (115 https://backpack.tf/profiles/76561199191769650#!/compare/1778716800/1778803200 / other one used in bulk https://backpack.tf/profiles/76561198340433719#!/compare/1779148800/1779235200) = 464 + Exo Strange Festivized Professional Killstreak Kukri

Capped at 450Keys

Your item

https://backpack.tf/item/926032714

https://backpack.tf/profiles/76561198109986831#!/compare/1779235200/1779321600

https://backpack.tf/profiles/76561197979219746#!/compare/1778803200/1779321600

80Keys + Cosmic Constellations All Hallows' Hatte(cant be minid cuz no other sales . buyers at 360 https://gyazo.com/6ff44f852cc8b3109066f32fc80ee306 ) = 440Keys

https://backpack.tf/profiles/76561198097003422#!/compare/1778976000/1779062400

https://backpack.tf/profiles/76561198109986831#!/compare/1778976000/1779062400

350Keys not showing on seller side so screenshot of your traded needed here

https://backpack.tf/item/205144334

https://backpack.tf/profiles/76561198261483133#!/compare/1777161600/1777248000

https://backpack.tf/profiles/76561197968954414#!/compare/1776643200/1777248000

Bulk