Resuggestion from - https://backpack.tf/suggestion/63c92a159cf210c87d0e9f61

and this one

mp - https://marketplace.tf/items/tf2/30662;5;u94

1 valid sale - 22.99 December 30th 2022

22.99 / 2.14 = 10.74 keys

History #1 - https://backpack.tf/item/9004125491

Sale #1 - Untrace

https://backpack.tf/profiles/76561198415211487#!/compare/1671148800/1674086400

https://backpack.tf/profiles/76561199193412191#!/compare/1671062400/1671148800

Sale #2 - Untrace

https://backpack.tf/profiles/76561199193412191#!/compare/1672444800/1672790400

https://backpack.tf/profiles/76561198008364271#!/compare/1671667200/1673222400

History #2 - https://backpack.tf/item/8637750742

Sale #1 - Sold to qs for 8 keys 42.55 ref

https://backpack.tf/profiles/76561198999742186#!/compare/1671235200/1672012800

https://backpack.tf/profiles/76561198850274253#!/compare/1671926400/1672012800

History #3 - https://backpack.tf/item/7695955520

Sale #1 - Untrace

https://backpack.tf/profiles/76561198159211784#!/compare/1652054400/1669939200

https://backpack.tf/profiles/76561199235932842#!/compare/1669852800/1670025600

History #4 - https://backpack.tf/item/4914818862

Sale #1 - 7 key histories match

https://backpack.tf/profiles/76561199103818277#!/compare/1669766400/1669852800

https://backpack.tf/profiles/76561198799351461#!/compare/1669680000/1669852800

Sale #2 - 1 for 1 with smoking conq

https://backpack.tf/profiles/76561198997375055#!/compare/1670630400/1670889600

https://backpack.tf/profiles/76561198799351461#!/compare/1670457600/1670889600

Conq mini - https://backpack.tf/suggestion/63c9280a5fbca41d0c0e3e12

Sale #3 - Dumped to buyorder - Untrace

https://backpack.tf/profiles/76561199127652476#!/compare/1670889600/1670976000

https://backpack.tf/profiles/76561198997375055#!/compare/1670889600/1671062400

Sale #4 - 10 keys 33.88 ref

https://backpack.tf/profiles/76561199127652476#!/compare/1671321600/1671408000

https://backpack.tf/profiles/76561198077231979#!/compare/1671321600/1671408000

Sale #5 - 7 keys 12 ref

https://backpack.tf/profiles/76561199127652476#!/compare/1671408000/1671494400

https://backpack.tf/profiles/76561198077231979#!/compare/1671408000/1671494400

History #5 - https://backpack.tf/item/5147410514

Sale #1 - untrace

https://backpack.tf/profiles/76561199310358451#!/compare/1669420800/1669420800

https://backpack.tf/profiles/76561198309544456#!/compare/1669334400/1669420800

Sale #2 - bulk dump

https://backpack.tf/profiles/76561198309544456#!/compare/1669420800/1670371200

https://backpack.tf/profiles/76561198311498888#!/compare/1669334400/1669420800

Sale #3 - untrace

https://backpack.tf/profiles/76561198311498888#!/compare/1670025600/1670112000

https://backpack.tf/profiles/76561198271831555#!/compare/1669939200/1670198400

Sale #4 - Seemingly 1/1 with aces bone dome

https://backpack.tf/profiles/76561198271831555#!/compare/1670198400/1670803200

https://backpack.tf/profiles/76561198311498888#!/compare/1670284800/1670371200

bone dome micro - (only 1 usable sale, better used there to give a range)

mannco - https://mannco.store/item/440-aces-high-unusual-bone-dome

$26 November 23 2022

26/1.85 / key price at time of sale

= 14

Sale #5 - untrace

https://backpack.tf/profiles/76561198311498888#!/compare/1673222400/1673308800

https://backpack.tf/profiles/76561198067094354#!/compare/1673222400/1673308800

----

Sales being 7 / 7.17 / 8.62 / 8.75 / 10.49 / 10.74 / 14

Classi - https://gyazo.com/654e32c42919fe0c6e1c1ea929e04626

Excluding 7/7.17/8.62/8.75 and 14 keys

Taking 10-11 keys

-----

https://gladiator.tf/time-machine?item=Electric%20Hat%20Protector%20A%20Head%20Full%20of%20Hot%20Air&at=2023-03-22T17:27:10.901Z

https://backpack.tf/item/9797141867

https://backpack.tf/item/6713769231

https://backpack.tf/item/12491185560

- sellers at 10 keys

Based on mod comment and new dated sellers, taking the range of 8.5 - 10 is better now.