Resuggestion, thanks to Shuffle for the info!

Sale 1:

https://backpack.tf/profiles/76561198086749028#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561198334598690#!/compare/1583366400/1583452800

Sold for 41 keys???

likely sold with something else.

Sale 2:

https://backpack.tf/profiles/76561198334598690#!/compare/1583798400/1583884800

https://backpack.tf/profiles/76561198052793694#!/compare/1583884800/1584057600

Sold for 35 keys

sale 3:

https://backpack.tf/profiles/76561198326254870#!/compare/1585180800/1585353600

https://backpack.tf/profiles/76561198197292179#!/compare/1585094400/1585180800

Bulk

sale 4:

https://backpack.tf/profiles/76561198197292179#!/compare/1587600000/1587686400

https://backpack.tf/profiles/76561198040248996#!/compare/1587600000/1587686400

Sold for 26 keys

Shuffle's Part:

https://marketplace.tf/items/tf2/1115;5;u3011 + https://backpack.tf/item/3034651833 - Sold for $70 (35 Keys)

Since 26 was from a person who's been dumping all of his items for next to quickbuyer price (26 is still only a key above that), I'd opt to cut it out.

35 flat will do.