History 1: https://backpack.tf/item/9166581557

Sold for 10 keys:

https://backpack.tf/profiles/76561199103818277#!/compare/1611792000/1611878400

https://backpack.tf/profiles/76561198004311443#!/compare/1610841600/1613433600

History 2: https://backpack.tf/item/5976108246

Dumped to Quicksell.Store:

https://backpack.tf/profiles/76561198177680054#!/compare/1612310400/1614470400

https://backpack.tf/profiles/76561198850178158#!/compare/1612224000/1612310400

History 3: https://backpack.tf/item/5711666914

Added an Ascension Taunt: Scorcher's Solo for a Delightful Star Shred Alert, better used there:

https://backpack.tf/profiles/76561198370200166#!/compare/1609804800/1609891200

https://backpack.tf/profiles/76561198115179017#!/compare/1609804800/1609891200

Bulk for the Strange Festivized Professional Killstreak Australium Knife:

https://backpack.tf/profiles/76561198115179017#!/compare/1610409600/1610496000

https://backpack.tf/profiles/76561198115740663#!/compare/1610496000/1610582400

History 4: https://backpack.tf/item/5442438482

Sold for 10 keys:

https://backpack.tf/profiles/76561198101915413#!/compare/1616544000/1616716800

https://backpack.tf/profiles/76561198068910302#!/compare/1616630400/1617408000

Unsolds:

Backpack.tf starting from 16 keys: https://gladiator.tf/listings/60681f9c54d94b8a019fdec8

Mannco.Store at ~14 keys (26.99/1.91=14.13 keys) https://mannco.store/item/27905

Marketplace.tf at ~14 keys (29.99/2.18=13.75 keys) https://marketplace.tf/items/tf2/30615;5;u3039

2 sales at 10 keys, going with 10 flat