Month 1 https://gladiator.tf/sales?item=Atomic%20Universal%20Translator&at=2022-07-11T01:56:25.177Z

1 @ 14 keys 62.44 ref

1 @ 14 keys 66.11 ref

2 @ 17 keys 20 ref

1 @ 20 keys 25 ref

Month 2 https://gladiator.tf/sales?item=Atomic%20Universal%20Translator&at=2022-06-11T01:56:25.177Z

1 @ 18 keys 33 ref

1 @ 19 keys 60 ref

Month 3 https://gladiator.tf/sales?item=Atomic%20Universal%20Translator&at=2022-05-11T01:56:25.177Z

1 @ 18 keys 30.44 ref

1 @ 18 keys 32 ref

1 @ 18 keys 32.22 ref

1 @ 18 keys 35.44 ref

1 @ 18 keys 41.22 ref

1 @ 18 keys 42.55 ref

1 @ 18 keys 46.11 ref

1 @ 18 keys 51 ref

1 @ 18 keys 51.66 ref

1 @ 18 keys 65.77 ref

1 @ 18 keys 43.55 ref

1 @ 18 keys 60 ref

2 @ 19 keys

2 @ 18 keys 69 ref

1 @ 19 keys 60 ref

1 @ 19 keys 60.66 ref

https://marketplace.tf/items/tf2/30658;5;u92

$38.11 / $1.74 = 21.90 keys

$38.11 / $1.74 = 21.90 keys

$38.11 / $1.73 = 22.03 keys

$38.11 / $1.73 = 22.03 keys

$38.11 / $1.73 = 22.03 keys

$38.11 / $1.74 = 21.90 keys

$38.11 / $1.74 = 21.90 keys

$38.11 / $1.74 = 21.90 keys

$38.11 / $1.75 = 21.78 keys

$38.11 / $1.78 = 21.41 keys

$38.11 / $1.77 = 21.53 keys (x2)

https://mannco.store/item/440-atomic-unusual-universal-translator

$34.99 / $1.62 = 21.60 keys

$34.9 / $1.61 = 21.68 keys

Classies: https://gladiator.tf/time-machine?item=Atomic+Universal+Translator&at=2022-07-11T00%3A08%3A00.000Z

Pure sales range from ~17-20, cash sales at ~21-22. Given sellers at 20, going with pure sales at 17 - 20 keys.