New sales:

https://backpack.tf/profiles/76561197974943082#!/compare/1714780800/1714867200

https://backpack.tf/profiles/76561198161130473#!/compare/1714780800/1714867200

Looks like you used it in bulk for a Scorching Flames Gauzed Gaze

https://backpack.tf/profiles/76561198161130473#!/compare/1715212800/1715299200

https://backpack.tf/profiles/76561198166162405#!/compare/1715212800/1715299200

Which then sold here for 150 keys + A lotta spelled weapons

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Mini for the Exorcism Pumpkin Bombs Strange Killstreak Wrench

https://backpack.tf/item/471491947

https://backpack.tf/profiles/76561198284388342#!/compare/1713312000/1713484800

https://backpack.tf/profiles/76561198166162405#!/compare/1713398400/1713484800

Sold here for 22 keys

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Mini for the Exorcism Strange Killstreak Crusader's Crossbow

https://backpack.tf/item/1853123972

https://backpack.tf/profiles/76561198082551051#!/compare/1520985600/1710806400

https://backpack.tf/profiles/76561198094818081#!/compare/1710720000/1710806400

9 keys, 21 ref = ~9.5 keys

https://backpack.tf/item/541898406

https://backpack.tf/profiles/76561199111292616#!/compare/1709856000/1709942400

https://backpack.tf/profiles/76561199194373523#!/compare/1709942400/1710028800

18 keys

https://backpack.tf/profiles/76561199194373523#!/compare/1714176000/1714262400

https://backpack.tf/profiles/76561198037457509#!/compare/1714176000/1714262400

Re-sold for 7 keys

I went through like 50 pages, might be best to just run with the 9.5 key dump as a mini here

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Mini for the Exorcism Strange Killstreak Ubersaw

https://backpack.tf/item/1917719418

https://backpack.tf/profiles/76561199059800460#!/compare/1708560000/1708646400

https://backpack.tf/profiles/76561199274251009#!/compare/1708646400/1709078400

9 keys

I'll probably range off sellers and go with 8 - 9 keys (8.5) [https://imgur.com/a/m2dQt9h]

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Mini for the Exorcism Strange Rescue Ranger

Surprisingly, there are no non-ks or even basic / spec ks sales I can use

Pro ks sales are too high

I'll just run with 8 keys as a mini (https://imgur.com/a/OtDiTxK)

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Mini for the Exorcism Strange Killstreak Minigun

https://backpack.tf/item/333740367

https://backpack.tf/profiles/76561198161130473#!/compare/1715472000/1715558400

https://backpack.tf/profiles/76561198057154811#!/compare/1715472000/1715558400

9 keys

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Mini for the Exocrism Halloween Fire Strange Festivized Killstreak Flame Thrower

https://backpack.tf/item/2165018257

https://backpack.tf/profiles/76561198045466865#!/compare/1712966400/1713052800

https://backpack.tf/profiles/76561198166162405#!/compare/1712707200/1713052800

40 keys (14368617970)

Probs range off the seller for 38 - 40 keys (39) [https://imgur.com/a/0nqBLm]

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Mini for the Excorism Pumpkin Bombs Strange Killstreak Stickybomb Launcher

https://backpack.tf/item/959626064

https://backpack.tf/profiles/76561198397843750#!/compare/1711843200/1711929600

https://backpack.tf/profiles/76561198166162405#!/compare/1711411200/1711929600

18 keys

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Mini for the Excorcism Pumpkin Bombs Strange Killstreak Grenade Launcher

https://backpack.tf/item/2464197084

https://backpack.tf/profiles/76561198319768593#!/compare/1711843200/1712016000

https://backpack.tf/profiles/76561198166162405#!/compare/1711929600/1712016000

16 keys

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So that puts the total at :

150 + 22 + 9.5 + 8.5 + 8 + 9 + 39 + 18 + 16 = 280 keys

I'm assuming you sold your double spelled foppish for 60 here

https://backpack.tf/profiles/76561197974943082#!/compare/1714780800/1714867200

If so you could probably update your purchase to 340 - 60 = 280

Funnily enough that makes two sales at 280 keys, which is what I would revise this here to