Item 1: https://backpack.tf/item/17050493641

Sale 1:

https://backpack.tf/profiles/76561198067211896#!/compare/1778198400/1779840000

https://backpack.tf/profiles/76561199084784906#!/compare/1779840000/1780099200

Sold to a QS bot for ?? (user privated their account before QS)

Item 2: https://backpack.tf/item/17034925944

Sale 2:

https://marketplace.tf/items/tf2/31385;5;u297

Sold for $319.99 on the 10th of June

Keys were $1.91 on the 10th

319.99/1.91

= 167.5

Rounding down to 165

Mannco sale isn't usable

Item 3: https://backpack.tf/item/15929098154

Sale 3:

https://backpack.tf/profiles/76561198882175555#!/compare/1779494400/1779580800

https://backpack.tf/profiles/76561197961179653#!/compare/1717891200/1779580800

Untrace

Item 4: https://backpack.tf/item/14353105789

Sale 5:

https://backpack.tf/profiles/76561199122632720#!/compare/1777161600/1777334400

https://backpack.tf/profiles/76561198785365817#!/compare/1777334400/1777507200

Seems scammed.

Excluding dump on the 28th due to seems to be scammer, excluding sale by STN as they dumped it to STN next day.

Which brings me to

Sale 6:

https://backpack.tf/profiles/76561198311498888#!/compare/1780790400/1780876800

https://backpack.tf/profiles/76561198028026547#!/compare/1780358400/1781049600

Sold for (21) keys pure + Iridescence Thousand-Yard Stare (95) + Strange Head Prize (~12) + Puffy Provocateur (4) + Strange Eyestalker War Paint (Factory New) (~2.5)

21+95+12+4+2.5

= 134.5

Rounding to 135

HOWEVER All items were dumped to STN for the Hellspawned Horns Mean Captain. Taking buyers for each (Which QS bot would of taken them at)

Would give the Thousand yard stare a value of 67.4 https://imgur.com/a/l2IaEqE - (Rounding to 68 keys) not 95, the rest can be left as they are around the same for buyers

21+68+12+4+2.5

= 107.5

Rounding to 108

Item 5: https://backpack.tf/item/13737563509

Sale 7:

https://backpack.tf/profiles/76561198140734851#!/compare/1774569600/1774656000

https://backpack.tf/profiles/76561199232380670#!/compare/1774569600/1774656000

Bot dumped for 138 keys

Item 6: https://backpack.tf/item/13662789423

Sale 8:

https://backpack.tf/profiles/76561198068640109#!/compare/1776556800/1776643200

https://backpack.tf/profiles/76561197982127154#!/compare/1776556800/1776643200

Bulk

Then moved to mptf

Item 7: https://backpack.tf/item/13661895097

Just movements to and from MP

//

Sellers:

BPTF - https://imgur.com/a/MGBoyyE - 2 @ 149, 1 @ 180, 1 listed on MP as per below

MPTF - https://marketplace.tf/items/tf2/31385;5;u297 - 2 @ $319.99

STN - https://stntrading.eu/item/tf2/Unusual+Hellspawned+Horns+Mean+Captain - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Mean%20Captain?appid=440&q=Hellspawned+Horns

Sale(s):

165, 108, 138

Excluding 108 being lower then current buyers (STN buying now for 130)

However still including 138 to account for the 'bot dumps' as it was a majority of sales

Additionally no reason to exclude 165 due to the sellers at 149 as they are fresh and fit in the range (almost in the middle which works)

Going with 138 - 165 keys