Item 1 History https://backpack.tf/item/1823955152

Sale 1

26 keys - from an auction

https://backpack.tf/profiles/76561198349672838#!/compare/1706918400/1707177600 (seller's keys & unusual)

https://backpack.tf/profiles/76561198046353418#!/compare/1706832000/1707091200 (my side)

Sale 2

Untrace (maybe 27 keys?)

https://backpack.tf/profiles/76561198349672838#!/compare/1706659200/1706918400

https://backpack.tf/profiles/76561198325974441#!/compare/1706572800/1706659200

Sale 3

26 keys, 25 ref.

https://backpack.tf/profiles/76561199177136435#!/compare/1706313600/1706400000

Key history shows they were in both backpacks. User https://backpack.tf/profiles/76561199177136435 and user https://backpack.tf/profiles/76561198325974441 traded with each other.

Item 2 History https://backpack.tf/item/2816632461

Sale 1 - trade bot

IDK

https://backpack.tf/profiles/76561199043177646#!/compare/1704758400/1704844800

Sale 2 - bulk

https://backpack.tf/profiles/76561199135952616#!/compare/1703203200/1703376000

https://backpack.tf/profiles/76561198311498888#!/compare/1703289600/1703376000

Looks like it was dumped to a bot after, couldn't find the sale.

Item 3 History https://backpack.tf/item/7956382191

Sale 1 - bulk

https://backpack.tf/profiles/76561198048166329#!/compare/1703548800/1703808000

The rest of the sales appear to be between trade bots and their owners.

Going with 26? Any more history of sales would be helpful for these hats. They don't seem to sell for pure that often.