Item 1:

https://backpack.tf/item/13778561887

Sale 1:

Untraceable/Bulk

https://backpack.tf/profiles/76561198081793950#!/compare/1717372800/1717459200

https://backpack.tf/profiles/76561198133227344#!/compare/1717286400/1717372800

Sale 2:

Untraceable

https://backpack.tf/profiles/76561198133227344#!/compare/1717372800/1717459200

https://backpack.tf/profiles/76561199240976002#!/compare/1717459200/1717545600

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Item 2:

https://backpack.tf/item/13655185277

Sale 3:

Bulk for Starlight Haze Flash of Inspiration

https://backpack.tf/profiles/76561198215429899#!/compare/1717372800/1717459200

https://backpack.tf/profiles/76561198114151975#!/compare/1717372800/1717459200

Sale 4:

Bulk for Frostbite Vintage Tyrolean + Green Black Hole Reggaelator

https://backpack.tf/profiles/76561198114151975#!/compare/1718409600/1718496000

https://backpack.tf/profiles/76561198157964204#!/compare/1718409600/1718496000

Sale 5:

Bulk for It's A Secret To Everybody Sergeant's Drill Hat + Strange Professional Killstreak Kritzkrieg

https://backpack.tf/profiles/76561198157964204#!/compare/1718668800/1718755200

https://backpack.tf/profiles/76561198070630154#!/compare/1718668800/1718755200

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Marketplace.TF Sales

https://marketplace.tf/items/tf2/31394;5;u297

https://marketplace.tf/items/tf2/5021;6

Sale 6:

https://backpack.tf/item/13731944760

$34.95/$1.65 = ~21 Keys (Apr 28)

Sale 7:

https://backpack.tf/item/14137815175

$33.95/$1.68 = ~20 Keys (Jul 6)

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Total Sales

20, 21

https://imgur.com/kP80bT8

With an unsold @ ~20 for 1 month, 21 looks high

Taking 20 Keys

Unsolds:

https://backpack.tf/item/13835987596 - 19.56

https://backpack.tf/item/13655185277 - 20

https://backpack.tf/item/13698634099 - 21

https://backpack.tf/item/13656609068 - 21

https://backpack.tf/item/13643054578 - $33.95

https://backpack.tf/item/13669428370 - $33.95

https://backpack.tf/item/13758544261 - $34.95

https://backpack.tf/item/13741947345 - 28