Update!

Sale 1: https://backpack.tf/profiles/76561198000247762#!/compare/1640131200/1640217600

https://backpack.tf/profiles/76561198095022965#!/compare/1640131200/1640217600

Sold for a Knifestorm Dragonborn Helmet (525 keys)

Mini for the Dragonborn: https://backpack.tf/suggestion/61ce52e5eb2e561ebd4cd88b

Sale 2: https://backpack.tf/profiles/76561198000247762#!/compare/1641600000/1641686400

https://backpack.tf/profiles/76561198220098345#!/compare/1641600000/1641686400

Sold for a Knifestorm Voodoo JuJu (Slight Return) (430 keys) + a Anti-Freeze Backbiter's Billycock (~93 keys) + a Tesla Coil Noble Nickel Amassment of Hats (29 keys)

430 + 93 + 29 = 552

Mini for the JuJu: https://backpack.tf/suggestion/61b3ee27fbd152130c56eece

Mini for the Nickel: https://backpack.tf/suggestion/61dac811ba5bc518f05f1883

Sale 3: https://backpack.tf/profiles/76561198220098345#!/compare/1641772800/1641859200

https://backpack.tf/profiles/76561199109683424#!/compare/1641772800/1641859200

Sold for a Duped Orbiting Fire Soldier's Stash (180 keys) + a Double Spelled Something Burning This Way Comes Nanobalaclava (176 keys) + 7x Strange Compatriot (~4.3 keys)

180 + 176 + (7 * 4.3) = 386

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Mini for the Double Spelled Nano:

Only other sale: https://backpack.tf/profiles/76561198177872379#!/compare/1638921600/1639008000

https://backpack.tf/profiles/76561199109683424#!/compare/1638921600/1639008000

Sold for a Double Spelled Strange Professional Killstreak Australium Rocket Launcher (145 keys) + a Spelled Strange Professional Killstreak Kukri (no mini that I could find, checked all 44 pages, taking lowest seller, 7 keys) + a Spelled Strange Professional Killstreak Revolver (10 keys) + a Strange Festive Jarate (~5 keys) + 9 pure

145 + 7 + 10 + 5 + 9 = 176

Mini for the Double Spelled RL: https://backpack.tf/profiles/76561198060515186#!/compare/1638921600/1639008000

https://backpack.tf/profiles/76561198415564349#!/compare/1638921600/1639008000

145 pure

Mini for the Spelled Revolver: https://backpack.tf/profiles/76561199079103004#!/compare/1639353600/1640044800

https://backpack.tf/profiles/76561198316441887#!/compare/1639958400/1640390400

10 pure

Mini for the Duped Stash: https://backpack.tf/profiles/76561198146046621#!/compare/1639440000/1639526400

https://backpack.tf/profiles/76561198229149424#!/compare/1639440000/1639526400

180 pure

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Sale 4: https://backpack.tf/profiles/76561198846276257#!/compare/1642118400/1642377600

https://backpack.tf/profiles/76561199109683424#!/compare/1642291200/1642377600

Use there.

Classies: https://i.imgur.com/LRj1t9a.png. Conclusion: 550 sold for way less, going with original 525 flat.