Month 1 https://gladiator.tf/sales?item=Showstopper%20Taunt:%20Most%20Wanted&at=2022-02-07T12:29:54.652Z

1 @ 2 keys 40.66 ref

1 @ 3 keys 12 ref

1 @ 3 keys 21.44 ref

Month 2 https://gladiator.tf/sales?item=Showstopper%20Taunt:%20Most%20Wanted&at=2022-01-07T12:29:54.652Z

Nothing

Month 3 https://gladiator.tf/sales?item=Showstopper%20Taunt:%20Most%20Wanted&at=2021-12-07T12:29:54.652Z

Nothing

https://marketplace.tf/items/tf2/30614;5;u3001

$6.48 / $1.91 = 3.39 keys

$6.48 / $1.82 = 3.56 keys

$6.48 / $1.81 = 3.58 keys

(Page of sellers at $6.48)

https://mannco.store/item/440-showstopper-unusual-taunt-most-wanted

$5.03 / $1.60 = 3.14 keys

$7.69 / $1.61 = 4.78 keys

$6.49 / $1.64 = 3.96 keys

Classies: https://gladiator.tf/listings/6201111e1684cdedf584a92e

Multiple ~3.3-3.35 key sellers, buyers up to ~2.7 keys. Including 3.4 keys to prevent the range from being too lopsided.

Going with 3.15-3.4 keys.