Using last 2 months.

Sale 1:

Sold with half a key in metal for 8 keys

https://backpack.tf/profiles/76561199106931116#!/compare/1703635200/1703721600

https://backpack.tf/profiles/76561198049794445#!/compare/1703635200/1704153600

https://backpack.tf/item/13949336767

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20Surgeon%27s%20Squeezebox&at=2023-12-29T10:15:20.172Z - labelled as 7 keys + 30 ref

= 7.5 keys

Sale 2:

Sold to a bot for 5 keys + 17.33 ref (rounds to 5.5)

https://backpack.tf/profiles/76561198027544408#!/compare/1703289600/1703376000

https://backpack.tf/profiles/76561199026390261#!/compare/1703289600/1703376000

https://backpack.tf/item/6771986579

= 5.5 keys

Sale 3:

Sold for 4 keys + 33 ref (rounds to 4.5)

https://backpack.tf/profiles/76561198197215790#!/compare/1698969600/1699056000

https://backpack.tf/profiles/76561199136027462#!/compare/1698969600/1699056000

https://backpack.tf/item/6481660799

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20Surgeon%27s%20Squeezebox&at=2023-12-02T10:15:20.172Z - gladiator confirms

= 4.5 keys

Other Sales:

#1

https://backpack.tf/profiles/76561199051617733#!/compare/1703289600/1703376000

https://backpack.tf/profiles/76561198027544408#!/compare/1703289600/1703376000

https://backpack.tf/item/6771986579

Bulk for Strange Kritzkrieg

#2

https://backpack.tf/profiles/76561198071383759#!/compare/1703030400/1703376000

https://backpack.tf/profiles/76561198087659130#!/compare/1703376000/1703462400

https://backpack.tf/item/6487654776

Bulk

#3

https://backpack.tf/profiles/76561198087659130#!/compare/1703548800/1703635200

https://backpack.tf/profiles/76561198054945991#!/compare/1703635200/1703721600

https://backpack.tf/item/6487654776

Bulk for keys

#4

https://backpack.tf/profiles/76561199539391520#!/compare/1698969600/1699228800

https://backpack.tf/profiles/76561198197215790#!/compare/1698796800/1698969600

https://backpack.tf/item/6481660799

Bulk/Untraceable

#5

https://backpack.tf/profiles/76561199136027462#!/compare/1701475200/1701561600

https://backpack.tf/profiles/76561199072654974#!/compare/1701475200/1701561600

https://backpack.tf/item/6481660799

Untraceable

#6

https://backpack.tf/profiles/76561199072654974#!/compare/1701475200/1701561600

https://backpack.tf/profiles/76561199099521803#!/compare/1701475200/1701561600

https://backpack.tf/item/6481660799

Untraceable

#7

https://backpack.tf/profiles/76561199099521803#!/compare/1703462400/1703548800

https://backpack.tf/profiles/76561199029736015#!/compare/1703376000/1703462400

https://backpack.tf/item/6481660799

Untraceable

#8

https://backpack.tf/profiles/76561198994642410#!/compare/1700006400/1704153600

https://backpack.tf/profiles/76561199099521803#!/compare/1700006400/1700092800

https://backpack.tf/item/13949336767

SCM

https://backpack.tf/item/6491637404 - bot transfer/mannco

Sellers/Buyers:

https://imgur.com/a/PMDAeNT

https://backpack.tf/item/6487654776 - 8 keys

Buyers as high as 5.08 keys.

Unconfirmed Gladiator Sales:

https://gladiator.tf/sales?item=Holy%20Grail%20Taunt:%20Surgeon%27s%20Squeezebox&at=2023-12-03T10:25:37.200Z - December 3rd

5 keys + 5 ref (~5 keys)

Sales at:

4.5

5.5

7.5

+ an unconfirmed sale at 5 keys on gladiator.

4.5 is too low, compared to the current buyer. The sale at 4.5 happened over a month ago.

Wasn't keen on keeping 5.5 based on a lone buyer, until i looked into the snapshots:

https://next.backpack.tf/classifieds/snapshots/Holy%20Grail%20Taunt:%20Surgeon's%20Squeezebox/658d5b77a9117916a107263b

https://imgur.com/a/HecLYae - December 28th

Sellers at <7 and ~7.5 keys.

https://next.backpack.tf/classifieds/snapshots/Holy%20Grail%20Taunt:%20Surgeon's%20Squeezebox/6584a409aa30eee50d00420b

https://imgur.com/a/z4wcHtU - December 22nd

This screenshot shows the <7 key seller above being listed at ~7.5 keys here, with another seller being listed for less than 7 keys.

The <7 key seller in the first screenshot was the one that sold for ~7.5 keys. Wouldn't be right to set a price at 7.5 when it was listed for less than 7 keys by two different sellers prior to that sale, especially if one of them was the one that sold for ~7.5 keys.

Taking 5.5-7.5.