2 years outdated.

Taking last 2 months.

Sold for 21 keys

https://backpack.tf/profiles/76561198192602363#!/compare/1591488000/1591833600

Untrace

https://backpack.tf/profiles/76561198850274253#!/compare/1588291200/1588377600

https://backpack.tf/profiles/76561198334598690#!/compare/1588291200/1588377600

Untrace

https://backpack.tf/profiles/76561198850274253#!/compare/1587859200/1587945600

https://backpack.tf/profiles/76561198020673987#!/compare/1587772800/1587945600

Sold for 18 keys + about 20.5 ref in sweets

https://backpack.tf/profiles/76561198058599230#!/compare/1591056000/1591142400

https://backpack.tf/profiles/76561198077929459#!/compare/1590969600/1591142400

Rounds to 18 keys

Untrace

https://backpack.tf/profiles/76561198398579602#!/compare/1591142400/1591228800

https://backpack.tf/profiles/76561198058599230#!/compare/1591142400/1591228800

Untrace

https://backpack.tf/profiles/76561198070065048#!/compare/1591142400/1591315200

https://backpack.tf/profiles/76561198398579602#!/compare/1591056000/1591142400

Maybe keys, but histories do not match.

Unknown

https://backpack.tf/profiles/76561198337734785#!/compare/1587686400/1587772800

https://backpack.tf/profiles/76561198140394607#!/compare/1587600000/1587772800

Sold for 15 keys + 5.11 refined

https://backpack.tf/profiles/76561198396499936#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198337734785#!/compare/1587254400/1587340800

Rounds to 15 keys

Sold for 16 keys + 28 refined

https://backpack.tf/profiles/76561198080179568#!/compare/1588291200/1588377600

https://backpack.tf/profiles/76561198023051867#!/compare/1588291200/1588723200

Rounds to 17 keys

Sold for 55.55 on May 1, 2020 (55.55/1.85 = 30.02 rounding to 30 keys)

Sold for 55.99 on May 15, 2020 (55.99/1.91 = 29.31 rounding to 29 keys)

https://marketplace.tf/items/tf2/30755;5;u15

https://backpack.tf/item/4419551641

Classifieds:

https://gyazo.com/8be48811b9629ea3fcda47105f6a2592

1 @ 15 keys

1 @ 17 keys

1 @ 18 keys

1 @ 21 keys

1 @ 29 keys

1 @ 30 keys

Highest buyers range from 16.55 to 16.6 keys. Excluding 15 and also excluding 17, as the sale itself was below buyers price.

Lowest sellers from 25 to 28 keys. Excluding 29 and 30.

Taking a range of 18-21 keys here.