Item 1:

https://backpack.tf/item/13196719794

Sale 1:

https://backpack.tf/profiles/76561197969793800#!/compare/1752364800/1752537600

https://backpack.tf/profiles/76561198021013907#!/compare/1752364800/1752537600

Sold for 710 keys pure (ID 15934034421)

Item 2:

https://backpack.tf/item/11179717526

Sale 2:

https://backpack.tf/profiles/76561198082775892#!/compare/1756339200/1756684800

https://backpack.tf/profiles/76561198334885466#!/compare/1756598400/1756771200

Sold what looks like it sold for ~615 keys (doesn't clearly show)

Item 3:

https://backpack.tf/item/8639198910

Sale 3:

https://backpack.tf/profiles/76561198123789684#!/compare/1754438400/1754524800

https://backpack.tf/profiles/76561198805103941#!/compare/1754438400/1754524800

Sold for a Disco Beat Down Crone's Dome (203) + 620 keys pure

= 823

Rounding to 820

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Mini for DBD crones:

https://marketplace.tf/items/tf2/920;5;u62

Sold for $450 on the 30th of July and $375 on the 22nd of August

Keys were

$1.94 on the 30th = 231 keys

$1.84 on the 22nd = 203 keys

Current sellers for crones:

https://imgur.com/a/ql9rwNu

Lowest at 224.

Excluding the 231 and going with 203

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Sale 4:

https://backpack.tf/profiles/76561198123789684#!/compare/1754179200/1754265600

https://backpack.tf/profiles/76561198068323872#!/compare/1754179200/1754352000 - Doesn't show clearly on sellers side

Sold with 40 keys for a Death's Daggers Mean Captain. Better used there

Item 4:

https://backpack.tf/item/8305821977

Sale 5:

https://backpack.tf/profiles/76561198085861958#!/compare/1755907200/1755993600

https://backpack.tf/profiles/76561198046995910#!/compare/1755907200/1755993600

Sold for (112) keys pure + Scorching Flames Killer Exclusive (570) + Searing Plasma Crone's Dome (103) + Summer Wave Taunt: Soldier's Requiem (2) + Operatic Triumph Taunt: Bad Pipes (2) + Award Winning Taunt: Borrowed Bones (3) + Verdant Phenomenon Taunt: Neck Snap (4) + Lavender Sensation Taunt: Bucking Bronco (2) + Verdant Phenomenon Taunt: The Killer Solo (3) + Snowy Day Taunt: Neck Snap (4) + Dead Presidents Bomb Beanie (8) + Screaming Tiger Taunt: Bare Knuckle Beatdown (2) + Showstopper Taunt: Mourning Mercs (12) + Fountain of Delight Taunt: Conga (15) + Shrieking Shades Bat Hat (27) + Magnifying Momentum Taunt: Teufort Tango (3) + After Eight (1) + Pink as Hell (2) + Waterlogged Lab Coat x3 (1) + Non-Craftable Festivizer x17 (6) + Name Tag x18 (7) + Strange Torcher's Trench Coat (5) + Strange Dead of Night (9)

Total

112 + 570 + 103 + 2 + 2 + 3 + 4 + 2 + 3 + 4 + 8 + 2 + 12 + 15 + 27 + 3 + 1 + 2 + 3 + 6 + 7 + 5 + 9

= 905

All of these prices are based on current auto buyers. The main one is the Scorching Flames KE which Pest is buying at 570:

https://imgur.com/a/SDucgIB

Also I have used bot buyers for the Searing Plasma Crone's even though it is date.

It would most definitely cap at the B/O of 850 though

https://next.backpack.tf/classifieds/snapshots/Scorching%20Flames%20Crone's%20Dome/68aae29ec36e06af96154ef7

https://imgur.com/a/5Lr7d7o

Sale 6:

https://backpack.tf/profiles/76561198120570555#!/compare/1752451200/1752537600

https://backpack.tf/profiles/76561198085861958#!/compare/1752451200/1752537600

Sold for 740 keys pure

445 keys show on sellers side, other keys were used to purchase a PE crones for 295 here (histories all match):

https://backpack.tf/profiles/76561198867208675#!/compare/1752451200/1752537600

Item 5:

https://backpack.tf/item/7113887611

Sale 7:

https://backpack.tf/profiles/76561198167532459#!/compare/1752278400/1752364800

https://backpack.tf/profiles/76561198001464756#!/compare/1752278400/1752364800

Traded back and forth

Sale 8:

https://backpack.tf/profiles/76561198001464756#!/compare/1756252800/1756512000

https://backpack.tf/profiles/76561198049588377#!/compare/1755993600/1756512000

Untrace, keys don't match on buyers side but only shows 566 keys total which is super low

Item 6:

https://backpack.tf/item/5080431184

Sale 9:

https://backpack.tf/profiles/76561198085861958#!/compare/1752451200/1752537600

https://backpack.tf/profiles/76561198347885088#!/compare/1752278400/1752537600

Untrace

Item 7:

https://backpack.tf/item/16011512544

Sale 10:

https://backpack.tf/profiles/76561199149052662#!/compare/1754524800/1755993600

https://backpack.tf/profiles/76561198091900807#!/compare/1754697600/1754956800

Untrace

Sale 11:

https://backpack.tf/profiles/76561198822773578#!/compare/1756684800/1756771200

https://backpack.tf/profiles/76561198091900807#!/compare/1756684800/1756771200

Looks like it sold for 640 keys pure (sellers side only shows)

Sale 12:

https://backpack.tf/profiles/76561198822773578#!/compare/1757635200/1757721600

https://backpack.tf/profiles/76561198261483133#!/compare/1757635200/1757721600

Bulk

Sellers:

BPTF - https://imgur.com/a/Zjjkimi - 1 @ 850, 2 @ 900

MPTF - https://marketplace.tf/items/tf2/920;5;u14 - None

STN - https://stntrading.eu/item/tf2/Unusual+Scorching+Flames+Crone%27s+Dome - None

SCM - https://imgur.com/a/rF76JGb - 1 @ $3,217.07AUD (~983 keys)

Sale(s):

710, 820, 615 (not confirmed), 850, 740, 640

Excluding 615 from the range as there are buyers for more plus it isn't clear. Additionally excluding 640 due to buyers for more.

The 820 isn't perfect but even with using bot buyers for the DBD Crones it will fall into the range. Even if there was sales higher than 850 I wouldn't put it anymore due to the unsold at 850.

Large range but going with 710 - 850 keys