Month 1 https://gladiator.tf/sales?item=Fountain%20of%20Delight%20Taunt:%20Burstchester&at=2022-02-09T23:23:38.049Z

1 @ 6 keys 17.88 ref

1 @ 6 keys 26.33 ref

1 @ 6 keys 35 ref

1 @ 6 keys 47.11 ref

1 @ 6 keys 50 ref

Month 2 https://gladiator.tf/sales?item=Fountain%20of%20Delight%20Taunt:%20Burstchester&at=2022-01-09T23:23:38.049Z

1 @ 6 keys 17.88 ref

1 @ 6 keys 49.44 ref

Month 3 https://gladiator.tf/sales?item=Fountain%20of%20Delight%20Taunt:%20Burstchester&at=2021-12-09T23:23:38.049Z

1 @ 7 keys 18.44 ref

https://marketplace.tf/items/tf2/30621;5;u3005

$14.99 / $1.92 = 7.81 keys

$14.99 / $1.86 = 8.06 keys

$14.99 / $1.87 = 8.02 keys

$14.99 / $1.82 = 8.24 keys

$14.99 / $1.83 = 8.19 keys

https://mannco.store/item/440-fountain-of-delight-unusual-taunt-burstchester

$13.99 / $1.69 = 8.28 keys

$13.99 / $1.60 = 8.74 keys

Classies: https://gladiator.tf/listings/62044cbde095ceb2d2d4d6c7

Sales at ~8 seem too high given page of sellers at ~7.5 and below. Page of ~6.7 buyers round to 6.5 keys.

All physical gladiator sales but one round to 6.5, and this higher sale rounds to 7.5 (so it seems like an outlier). Going with 6.5 flat.