https://marketplace.tf/items/tf2/30621;5;u3003;strange

Two listed at $33.33, one previously had a pure buyout of 14 keys https://gladiator.tf/time-machine?item=Strange+Holy+Grail+Taunt%3A+Burstchester&at=2022-11-27T14%3A57%3A00.000Z, so at least one of the sales would cap at that

https://mannco.store/item/440-holy-grail-strange-unusual-taunt-burstchester

https://manic.tf/keyprice/?at=2022-09-29&site=mannco.store

https://backpack.tf/item/6234056715

$18.05 / $1.78 = 10.14 keys

https://manic.tf/keyprice/?at=2022-10-27&site=mannco.store

https://backpack.tf/item/5796353731

$39.95 / $1.81 = 22.07 keys

https://manic.tf/keyprice/?at=2022-12-21&site=mannco.store

$18.16 / $1.89 = 9.61 keys

https://backpack.tf/item/7310822508

https://backpack.tf/profiles/76561198160856661#!/compare/1666656000/1666742400

https://backpack.tf/profiles/76561199101711836#!/compare/1666742400/1666828800

https://gladiator.tf/time-machine?item=Strange%20Holy%20Grail%20Taunt:%20Burstchester&at=2022-10-26T05:18:13.000Z

https://gladiator.tf/sales?item=Strange%20Holy%20Grail%20Taunt:%20Burstchester&at=2022-10-26T21:49:31.294Z

~12 key buy order, seller previously had it listed at 14 keys before dumping https://gladiator.tf/time-machine?item=Strange+Holy+Grail+Taunt%3A+Burstchester&at=2022-10-26T03%3A07%3A00.000Z, supporting a lower value here

https://marketplace.tf/items/tf2/30621;5;u3003;strange

Listed by bot owner

https://backpack.tf/item/4445366804

https://backpack.tf/profiles/76561199102777012#!/compare/1669248000/1669507200

https://gladiator.tf/time-machine?item=Strange+Holy+Grail+Taunt%3A+Burstchester&at=2022-11-27T14%3A57%3A00.000Z

https://gladiator.tf/sales?item=Strange%20Holy%20Grail%20Taunt:%20Burstchester&at=2022-11-28T08:39:27.158Z

14 keys

Sales:

10

10

12

14

22

https://gladiator.tf/time-machine?item=Strange%20Holy%20Grail%20Taunt:%20Burstchester&at=2022-12-24T21:52:13.143Z

Current generic buyers up to ~12 keys

Listings on marketplace.tf are ~16 keys, so excluding 22 for being high. Excluding 10 for being below buyers and to balance the range. Including 12 to compensate for excluding the lower sales at 10.

Taking 12 - 14 keys.