Using Gladiator.tf here (there are way more than 3 sales at each value so it should be fine)

1st month https://gladiator.tf/sales?item=Cursed%20Confinement%20Taunt:%20Square%20Dance&at=2021-12-26T20:56:07.933Z

Sales:

2 @ 8 keys

Buys:

4 @ 6 keys 48 ref ~6.5 keys

2 @ 7 keys 5 ref ~7 keys

2nd month: https://gladiator.tf/sales?item=Cursed%20Confinement%20Taunt:%20Square%20Dance&at=2021-11-26T20:56:07.933Z

Sales:

3 @ 8 keys

1 @ 9 keys

Buys:

1 @ 7 keys

5 @ 7 keys 5 ref ~7 keys

3rd month: https://gladiator.tf/sales?item=Cursed%20Confinement%20Taunt:%20Square%20Dance&at=2021-10-26T20:56:07.933Z

Buys:

1 @ 7 keys 2 ref ~7 keys

1 @ 8 keys

~~

https://marketplace.tf/items/tf2/1106;5;u3060 no sales

~~

https://mannco.store/item/440-cursed-confinement-unusual-taunt-square-dance

$49 / $1.70 = 28.82 keys ~29 keys

$13.79 / $1.71 = 8.06 keys ~8 keys (x2)

$25.99 / $1.72 = 15.11 keys ~15 keys

$26 / $1.66 = 15.66 keys ~16 keys

Sales at 6.5 (x4), 7 (x9), 8 (x8), 15, 16, 29

Sellers at 8 keys, buyers are creeping over 6.5 https://gladiator.tf/listings/61c8c566db6b367ed8811304

The 15-29 Mannco.Store sales are obviously high. Gonna cut off 6.5 too since buyers are creeping over that value, and it makes up for the higher sales being excluded

Taking 7-8 keys here, which is the most common trading point