Month 1 https://gladiator.tf/sales?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-10-20T06:50:10.087Z

1 @ 11 keys 12.22 ref

Month 2 https://gladiator.tf/sales?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-09-20T06:50:10.087Z

1 @ 12 keys 22.77 ref

1 @ 12 keys 24.22 ref

Month 3 https://gladiator.tf/sales?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-20T06:50:10.087Z

1 @ 13 keys 4.22 ref

1 @ 13 keys 8.44 ref

1 @ 13 keys 14.22 ref

1 @ 13 keys 32.88 ref

1 @ 13 keys 39.33 ref

1 @ 13 keys 41.66 ref

1 @ 13 keys 56.55 ref

1 @ 14 keys 33 ref

1 @ 16 keys

1 @ 18 keys

https://marketplace.tf/items/tf2/31112;5;u155

$33.44/1.83 = ~18 keys

$33.11/1.88 = ~18 keys

$33.11/1.95 = ~17 keys

$33.11/1.95 = ~17 keys

$29.99/1.95 = ~15 keys

https://mannco.store/item/440-kaleidoscope-unusual-bazaar-bauble

$27/1.67 = ~16 keys

$20.5/1.78 = ~12 keys

$17.1/1.77 = ~10 keys

$17/1.78 = ~10 keys

https://backpack.tf/item/11635730011

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-02T11:37:07.000Z

Likely ~14 keys

https://backpack.tf/item/12131436551

https://backpack.tf/profiles/76561198103927443#!/compare/1665532800/1665964800

https://gladiator.tf/time-machine?item=Kaleidoscope+Bazaar+Bauble&at=2022-10-15T14%3A16%3A00.000Z

~11 keys

https://backpack.tf/item/9486286726

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-02T14:10:24.000Z

Likely ~14 keys

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-05T16:38:11.000Z

Likely ~15 keys

https://backpack.tf/item/9216791992

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-02T14:05:22.000Z

Likely ~14 keys

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-03T14:01:16.000Z

Likely ~15 keys

https://backpack.tf/item/9152702117

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-03T14:18:40.000Z

Likely ~14-15 keys

https://backpack.tf/item/9141506491

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-02T16:10:18.000Z

Likely ~14 keys

https://backpack.tf/profiles/76561198130136243#!/compare/1659398400/1659484800

Bulk

https://backpack.tf/profiles/76561198405181718#!/compare/1660003200/1660089600

https://backpack.tf/profiles/76561198142416019#!/compare/1660003200/1660089600

https://gladiator.tf/time-machine?item=Kaleidoscope%20Bazaar%20Bauble&at=2022-08-09T19:06:10.000Z

Probably ~15 keys

https://backpack.tf/profiles/76561198142416019#!/compare/1660089600/1660176000

https://backpack.tf/profiles/76561198046555547#!/compare/1660003200/1660176000

14 keys

https://gladiator.tf/time-machine?item=Kaleidoscope+Bazaar+Bauble&at=2022-10-16T16%3A34%3A00.000Z

Buyers at ~11 just a few days ago, sellers ~14-15. Everything above that seems outlier-ish.

Going with 11 - 15 keys.