Item 1:

https://backpack.tf/item/2357402591

Sale 1:

Bulk for Spellbound Tough Stuff Muffs

https://backpack.tf/profiles/76561198054198170#!/compare/1701820800/1702425600

https://backpack.tf/profiles/76561198000247762#!/compare/1701648000/1701993600

Sale 2:

Sold for 230 Keys (Unusual ID: "14104171244")

https://backpack.tf/profiles/76561198000247762#!/compare/1706400000/1706486400

https://backpack.tf/profiles/76561198113190503#!/compare/1706400000/1706486400

Sale 3:

Sold for 131 + Circling Peace Sign Trucker's Topper + Disco Beat Down Cosa Nostra Cap + Searing Plasma Tough Stuff Muffs

https://backpack.tf/profiles/76561198113190503#!/compare/1707436800/1707523200

https://backpack.tf/profiles/76561198131911699#!/compare/1707436800/1707523200

//

Item 2:

https://backpack.tf/item/4520241862

Sale 4:

Sold for ~200 Keys (Unusual ID: "13820764183")

https://backpack.tf/profiles/76561198146046621#!/compare/1700438400/1700524800

https://backpack.tf/profiles/76561199026390261#!/compare/1700438400/1700524800

Sale 5:

Untraceable

https://backpack.tf/profiles/76561199026390261#!/compare/1701993600/1702080000

https://backpack.tf/profiles/76561198867668607#!/compare/1701561600/1701993600

Sale 6:

Bulk for Spellbound Galvanized Gibus

https://backpack.tf/profiles/76561198867668607#!/compare/1703894400/1703980800

https://backpack.tf/profiles/76561198799601783#!/compare/1703894400/1703980800

Sale 7:

Sold for 270 Keys (Unusual ID: "14017743562")

https://backpack.tf/profiles/76561198799601783#!/compare/1704499200/1704585600

https://backpack.tf/profiles/76561198807682821#!/compare/1704499200/1704585600

//

Total Sales

200, 230, ⪅269 , 270

https://imgur.com/a/xxIlMNu

Given that the sale @ 200 Keys was a dump to STN, 200 can be excluded

Taking 230 - 270 Keys