Woah, needs a refresh suggestion.

Also, thank you Lemonade! I don't think I could find other sales, thanking you for gathering more evidence! Cheers. :P

Old Sale

1 Sale, by me! (23rd of October, 2019. Sale)

https://backpack.tf/item/4466584987

GhostyOsty - https://backpack.tf/profiles/76561198115599217

https://backpack.tf/profiles/76561198115599217#!/compare/1571616000/1571788800

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

* Mann Co. Supply Crate Key (51.22–51.44 ref)

Buyer: Mushimen - https://backpack.tf/u/76561198235159048

https://backpack.tf/profiles/76561198235159048#!/compare/1571529600/1571788800

* Accursed Taunt: Bucking Bronco

Marketplace.tf

No sales, 3 buy orders. None have succeeded.

New/more recent Sales

Sold for 17 keys:

https://backpack.tf/profiles/76561198072181775#!/compare/1574726400/1574812800

https://backpack.tf/profiles/76561198334946156#!/compare/1574726400/1574812800

Sold for Sunbeams Brain Interface:

https://backpack.tf/profiles/76561198963636134#!/compare/1571961600/1572048000

https://backpack.tf/profiles/76561198062205682#!/compare/1571788800/1572048000

Sold for some spelled stuff:

https://backpack.tf/profiles/76561198235159048#!/compare/1571788800/1571961600

https://backpack.tf/profiles/76561198963636134#!/compare/1571875200/1571961600

Another 15 key sale:

https://backpack.tf/profiles/76561198072326844#!/compare/1574640000/1574726400

https://backpack.tf/profiles/76561198072181775#!/compare/1574467200/1574726400

another sale:

histories dont match up but could be 16 keys

https://backpack.tf/profiles/76561198331167728#!/compare/1576368000/1576540800

https://backpack.tf/profiles/76561198070143764#!/compare/1576368000/1576454400

Help from Lemonade