Thanks to Shuffle Spy, for helping me out with this.

https://backpack.tf/profiles/76561198087806226#!/compare/1583625600/1583712000 - Sold for 10 Keys (9 are here, 1 in the link below).

https://backpack.tf/profiles/76561198978621382#!/compare/1583625600/1584057600 - The key below the Headsplitter (It's actually The Flying Guillotine) is #10.

https://imgur.com/a/R18AzWj - I had an Electrostatic Hustler's Hallmark brokered, which was sold for the Overclocked Tavish DeGroot Experience and Strange Specialized Killstreak Australium Ambassador.

10 Keys will work here.