6 months outdated.

Taking last 2 months.

Sold for 16 keys

https://backpack.tf/profiles/76561198168863803#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561198127768920#!/compare/1586908800/1587168000

Sold for keys?

https://backpack.tf/profiles/76561198087448314#!/compare/1591401600/1591488000

https://backpack.tf/profiles/76561198094230147#!/compare/1591488000/1591574400

Sold for 12 keys + 22 refined

https://backpack.tf/profiles/76561198212213499#!/compare/1591315200/1591401600

https://backpack.tf/profiles/76561198087448314#!/compare/1591228800/1591315200

Rounds to 12 keys

Bulk for Isotope Killstreak Alpine Shotgun (Minimal Wear)

https://backpack.tf/profiles/76561198209640976#!/compare/1589932800/1590019200

https://backpack.tf/profiles/76561198215559840#!/compare/1589846400/1590019200

Sold with Cloud 9 Napper's Respite for?

https://backpack.tf/profiles/76561198178754705#!/compare/1588291200/1588550400

https://backpack.tf/profiles/76561198209640976#!/compare/1588204800/1588291200

Sold for 40 on April 30, 2020

40/1.82 = 21.97 rounding to 22 keys

https://marketplace.tf/items/tf2/147;5;u19

Seems like this one:

https://backpack.tf/item/418839003

Buyout was 15 keys:

https://bot.tf/stats/listings/4P09PO85

Capping at 15 keys.

Classifieds:

https://gyazo.com/e8d89c03eab12dd9c81dd41c54f51d35

1 @ 12 keys

1 @ 15 keys

1 @ 16 keys

Highest buyers ranging from 13.17 to 13.48 keys. Excluding 12.

Taking a range of 15-16 keys here.