1st item: https://backpack.tf/item/1391225311

1: https://backpack.tf/profiles/76561198135388328#!/compare/1644451200/1644537600

https://backpack.tf/profiles/76561198033969415#!/compare/1644451200/1644796800

~13 keys, can't be used because buy offers are higher than 13 keys.

2: https://backpack.tf/profiles/76561198412985333#!/compare/1644883200/1644969600

https://backpack.tf/profiles/76561198135388328#!/compare/1644883200/1644969600

bulk

3: https://backpack.tf/profiles/76561198065933580#!/compare/1645056000/1645142400

https://backpack.tf/profiles/76561198412985333#!/compare/1645056000/1645142400

Circling Peace Sign Hollowed Helm is unpriced.

4: https://backpack.tf/profiles/76561199004803157#!/compare/1645142400/1645228800

https://backpack.tf/profiles/76561198065933580#!/compare/1645056000/1645142400

lack of compare history.

5: https://backpack.tf/profiles/76561199004803157#!/compare/1645228800/1645315200

https://backpack.tf/profiles/76561198128813760#!/compare/1645228800/1645315200

16 keys

2nd item: https://backpack.tf/item/6810838481

1: https://backpack.tf/profiles/76561198088401371#!/compare/1614988800/1622246400

https://backpack.tf/profiles/76561199004803157#!/compare/1642118400/1644710400

(im)possible to compare

2: https://backpack.tf/profiles/76561198054758757#!/compare/1642377600/1642723200

https://backpack.tf/profiles/76561198088401371#!/compare/1614988800/1622246400

literally impossible to compare

3: Item went to mannco.store bot

4: Mannco.store sale: https://mannco.store/item/440-smoking-unusual-hermes

Sale - 28$

Key price (February 4) - 1.67$

28 / 1.67 = ~17 keys

3rd item: https://backpack.tf/item/801578723

1: https://backpack.tf/profiles/76561198364902428#!/compare/1643932800/1644019200

https://backpack.tf/profiles/76561199024067184#!/compare/1643932800/1644019200

lack of compare history.

2: https://backpack.tf/profiles/76561199043177646#!/compare/1645142400/1645228800

https://backpack.tf/profiles/76561198364902428#!/compare/1645142400/1645228800

still lack of compare history.

Price at 16-17 keys.