Gladiator.tf:

1st month: https://gladiator.tf/sales?item=Midnight%20Whirlwind%20Taunt:%20Luxury%20Lounge&at=2021-12-26T22:23:56.588Z

Sales:

1 @ 6 keys

Buys:

1 @ 5 keys 39 ref ~5.5 keys

2nd month: https://gladiator.tf/sales?item=Midnight%20Whirlwind%20Taunt:%20Luxury%20Lounge&at=2021-11-26T22:23:56.588Z

Buys:

2 @ 5 keys 44.66 ref ~5.5 keys

3rd month: https://gladiator.tf/sales?item=Midnight%20Whirlwind%20Taunt:%20Luxury%20Lounge&at=2021-10-26T22:23:56.588Z

Sales:

1 @ 6 keys 14 ref ~6 keys

Buys:

1 @ 5 keys 33.66 ref ~5.5 keys

1 @ 5 keys 44.66 ref ~5.5 keys

~~

https://marketplace.tf/items/tf2/30922;5;u3008 nothing in-date but a sale at ~6 keys just went out of date

~~

https://mannco.store/item/440-midnight-whirlwind-unusual-taunt-luxury-lounge

$10/1.58=6.32 ~6.5 keys

https://gladiator.tf/listings/61c8e522f93befdf78e20834

Sellers at ~6 keys, buyers at 5.63

Taking 5.5-6 keys here, excluding 6.5 because there's multiple for sale at 6 but including 5.5 because it's a really common trading point