~224 in existence

Month 1 https://gladiator.tf/sales?item=Voltaic%20Hat%20Protector%20Universal%20Translator&at=2022-05-02T12:54:39.243Z

1 @ 18 keys 7 ref

1 @ 18 keys 14.55 ref

1 @ 18 keys 20.66 ref

1 @ 19 keys

1 @ 19 keys 30 ref

1 @ 19 keys 67.66 ref

1 @ 19 keys 69 ref

1 @ 20 keys

1 @ 22 keys

1 @ 22 keys

Month 2 https://gladiator.tf/sales?item=Voltaic%20Hat%20Protector%20Universal%20Translator&at=2022-04-02T12:54:39.243Z

1 @ 17 keys 51.11 ref

1 @ 17 keys 55.33 ref

1 @ 18 keys 39.33 ref

1 @ 18 keys 50.77 ref

1 @ 18 keys 53.44 ref

1 @ 18 keys 54.22 ref

1 @ 18 keys 57.55 ref

1 @ 19 keys

1 @ 19 keys 2.55 ref

1 @ 19 keys 4.22 ref

1 @ 19 keys 22 ref

3 @ 19 keys 34.22 ref

1 @ 21 keys

Month 3 https://gladiator.tf/sales?item=Voltaic%20Hat%20Protector%20Universal%20Translator&at=2022-03-02T12:54:39.243Z

1 @ 18 keys 3.22 ref

1 @ 18 keys 21.77 ref

1 @ 18 keys 21.88 ref

1 @ 18 keys 22 ref

1 @ 18 keys 25.44 ref

2 @ 19 keys

1 @ 19 keys 33 ref

https://marketplace.tf/items/tf2/30658;5;u96

$39.99 / $1.78 = 22.47 keys

$39.99 / $1.74 = 22.98 keys

$39.99 / $1.74 = 22.98 keys

$39.99 / $1.74 = 22.98 keys

$42.99 / $1.73 = 24.85 keys

$42.99 / $1.73 = 24.85 keys

$42.99 / $1.73 = 24.85 keys

$42.99 / $1.73 = 24.85 keys

$42.99 / $1.73 = 24.85 keys

$42.99 / $1.74 = 24.71 keys

$42.99 / $1.75 = 24.57 keys

$42.99 / $1.80 = 23.88 keys (x2)

https://mannco.store/item/440-voltaic-hat-protector-unusual-universal-translator

$34.99 / $1.59 = 22.01 keys

$34.99 / $1.62 = 21.60 keys

(Two sellers at $39.99)

https://gladiator.tf/listings/6269a44f5c8d09e3ab16b3b2

One seller at 22 has been unsold for a few weeks, the other ones listed at ~19 and 22 have sold. Buyers now just about round up to ~19.

Given higher buyers now, and quite a few MP sales above 22, going to exclude 18 on the low end to balance out the range a bit.

Taking 19-22 keys.