Pricing the unpriced!

Sale 1: https://backpack.tf/profiles/76561199043717377#!/compare/1591574400/1591660800

https://backpack.tf/profiles/76561198377298887#!/compare/1591574400/1591660800

?

Sale 2: https://backpack.tf/profiles/76561198377298887#!/compare/1591660800/1591833600

https://backpack.tf/profiles/76561198048851745#!/compare/1591660800/1591747200

?

Sale 3: https://backpack.tf/profiles/76561199043717377#!/compare/1590883200/1590969600

https://backpack.tf/profiles/76561198252237762#!/compare/1590969600/1591056000

15 pure.

Sale 4: https://backpack.tf/profiles/76561198252237762#!/compare/1591056000/1591228800

https://backpack.tf/profiles/76561198021697319#!/compare/1591056000/1591228800

29 pure

Sale 5: https://backpack.tf/profiles/76561198021697319#!/compare/1591315200/1591488000

https://backpack.tf/profiles/76561198454615761#!/compare/1591401600/1591488000

12 pure + ref.

Sale 6: https://marketplace.tf/items/tf2/30647;5;u16 - 59.99/1.88 = ~32

https://backpack.tf/item/7812613728

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Additional by the King:

Recent sale at $41.25 (~21 keys) on marketplace, pair of sellers at $41.25 as well. 15-21 should be fine.

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Classies: https://i.imgur.com/2BvfkEs.png. 15-21.