Using last 2 months.

Sale 1:

Sold to a bot for 2 keys + 43.77 ref (~0.7 keys)

https://backpack.tf/profiles/76561199538936442#!/compare/1703203200/1703289600

https://backpack.tf/profiles/76561199183541107#!/compare/1703203200/1703289600

https://backpack.tf/item/11249983742

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20Yeti%20Punch&at=2023-12-26T12:57:36.091Z - Gladiator confirms

= 2.7 keys

Sale 2:

Sold for 2 keys + 35 ref (~0.55 keys)

https://backpack.tf/profiles/76561199487676443#!/compare/1703116800/1703376000

https://backpack.tf/profiles/76561198142120893#!/compare/1703030400/1703116800

https://backpack.tf/item/11249983742

= 2.55 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198142120893#!/compare/1703116800/1703203200

https://backpack.tf/profiles/76561199538936442#!/compare/1703030400/1703203200

https://backpack.tf/item/11249983742

Untraceable. 1 key matches on the buyer's end.

#2

https://backpack.tf/profiles/76561197962802715#!/compare/1704499200/1705708800

https://backpack.tf/profiles/76561199110809353#!/compare/1704412800/1704499200

https://backpack.tf/item/8036958433

Untraceable.

#3

https://backpack.tf/profiles/76561199111556258#!/compare/1704067200/1704153600

https://backpack.tf/profiles/76561199564942025#!/compare/1704067200/1704153600

https://backpack.tf/item/6255444502

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20Yeti%20Punch&at=2024-01-03T13:02:18.846Z - labelled as 2 keys + 40 ref

Untraceable.

#4

https://backpack.tf/profiles/76561199135952616#!/compare/1704067200/1704153600

https://backpack.tf/profiles/76561199193412191#!/compare/1704067200/1704153600

https://backpack.tf/item/6252868492

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20Yeti%20Punch&at=2024-01-02T13:08:16.479Z - labelled as 2 keys + 56.33 ref & 2 keys + 40 ref

Untraceable. Good chance it was bought by someone else and re-sold to a bot for higher.

https://backpack.tf/item/6252762790 - mannco

Sellers:

https://imgur.com/a/z8t3aCw

https://backpack.tf/item/6271281170 - ~3.3 keys

https://backpack.tf/item/11249983742 - ~3.3 keys

https://backpack.tf/item/6252868492 - marketplace

Sales at:

2.55

2.7

+ Unconfirmed gladiator sales at 2 keys + 40 ref (~2.65 keys, 2x) and 2 keys + 56.33 ref (~2.9 keys)

Don't want to add the 2.9 key sale without confirmation. Excluding for now.

Taking 2.55-2.7 keys.