https://backpack.tf/profiles/76561198056793885#!/compare/1613001600/1613088000 ~ 4810 Keys

https://backpack.tf/item/2047232897 ~ Item

Sale) Sold for a Purple Energy Polar Pullover (2700 Keys) + Harvest Moon Aztec Aggressor + Stormy 13th Valley Forge + Chiroptera Venenata Belgian Detective + Flaming Lantern Das Hazmattenhatten + Accursed Conga + It's A Secret To Everybody Ye Olde Baker Boy (1481 Keys together) + Sunbeams Pyromancer's (535 Keys) + 94 Keys

2700 + 1481 + 535 + 94 = 4810 Keys

Aztec, Valley, Belgian, Hazmat, Conga, and Baker Mini

https://backpack.tf/profiles/76561198056793885#!/compare/1613088000/1613174400 ~ Sold + 94 Keys for a Scorching Flames Exquisite Rack (900 Keys) + Duped Cloudy Moon Villain's Veil (675 Keys)

900 + 675 - 94 = 1481 Keys

Scorching Flames Exquisite Rack Mini ~ 900 Keys

https://backpack.tf/suggestion/60add4157a4fa33330186975

Duped Cloudy Moon Villain's Veil Mini ~ 675 Keys

https://backpack.tf/item/561503610 ~ Item

Sale 1) Sold for a Harvest Moon Fancy Fedora + Burning Flames Surgeon's Stahlhelm + Cool Specialized Killstreak Sand Cannon Rocket Launcher (Well-Worn) + Plum Prankster Punk's Pomp

https://backpack.tf/profiles/76561198838788284#!/compare/1612310400/1612396800

https://backpack.tf/profiles/76561198218497692#!/compare/1612310400/1612396800

Multiple items don't have Minis, so this sale can be excluded.

Sale 2) Sold + Laugh-O-Lantern Rotation Sensation (135 Keys) for a Purple Energy Aztec Warrior (350 Keys) + Steaming Antlers (297.5 Keys) + Frozen Icefall Winter Wrap Up + Strange Galactic Gateway Hephaistos' Handcraft (215.5 Keys together)

https://backpack.tf/profiles/76561198218497692#!/compare/1612310400/1612396800

https://backpack.tf/profiles/76561198139171368#!/compare/1612310400/1612396800

350 + 297.5 + 215.5 - 135 = 728, which can be rounded to 725 Keys.

Laugh-O-Lantern Rotation Sensation Mini

https://backpack.tf/suggestion/6085953d43d6c70c79249619 ~ 135 Keys

Purple Energy Aztec Warrior Mini

https://backpack.tf/suggestion/6084b20fb158dd71a11d3547 ~ 350 Keys

Strange Galactic Gateway Hephaistos' Handcraft Mini

https://backpack.tf/profiles/76561198032481426#!/compare/1612310400/1612483200 ~ Sold + 15 Keys + Smoking Cloud Crasher (10.5 Keys) for a Cloudy Moon Modest Pile of Hat (241 Keys)

241 - 15 - 10.5 = 215.5 Keys

Smoking Cloud Crasher Mini

https://backpack.tf/profiles/76561198032481426#!/compare/1612656000/1612915200 ~ Sold for 7 Keys + Collector's Festive FaN Set (3 Keys)

https://steamcommunity.com/market/listings/440/Collector%27s%20Festive%20Force-A-Nature%20Chemistry%20Set ~ Set goes for 3 Keys

https://cdn.discordapp.com/attachments/433086365144580107/835274924997607444/63db1cf38a2dbee6648b1aebcd39a0c8.png ~ Sold for 11 Keys

Cloudy Moon Modest Pile of Hat Mini

https://backpack.tf/profiles/76561198027354784#!/compare/1611014400/1611100800 ~ Sold for 145 Keys + Cloudy Moon Scotch Bonnet (96 Keys)

https://backpack.tf/profiles/76561198218497692#!/compare/1612569600/1612656000 ~ Bulk sale

https://backpack.tf/profiles/76561198140316312#!/compare/1613433600/1613520000 ~ Sold for 160 Keys + Vivid Plasma Killer Exclusive + Strange Festivized Australium Grenade Launcher

https://backpack.tf/profiles/76561198049469629#!/compare/1613952000/1614038400 ~ Sold for a Scorching Flames Brown Bomber (137.5 Keys) + Purple Energy Honcho's Headgear (58.5 Keys)

The KE sale is 230 Keys minimum and was dumped for 196 Keys, so both of those can be excluded.

241 works for the Modest's price as a Mini, even though it's 3.5 months old.

Cloudy Moon Scotch Bonnet Mini

https://backpack.tf/suggestion/6061183dac05d358d2263e53 ~ The comments would make this 96 Keys

Purple Energy Honcho's Headgear Mini

https://backpack.tf/suggestion/6085c85d3871385b007a1fda ~ 58.5 Keys

Sale 3) Bulk sale

https://backpack.tf/profiles/76561198139171368#!/compare/1613088000/1613174400

https://backpack.tf/profiles/76561198056793885#!/compare/1613088000/1613174400

Sale 4) Sold + Duped Circling Peace Sign Bonk Boy for a Duped Scorching Flames Exquisite Rack (620 Keys)

https://backpack.tf/profiles/76561198105071091#!/compare/1613433600/1613606400

Low outlier.

Duped Scorching Flames Exquisite Rack Mini

https://gyazo.com/771e42328f85b87d68148109114b8b41 ~ 620 Keys

Sale 5) Sold for a bunch of items

https://backpack.tf/profiles/76561198105071091#!/compare/1613865600/1613952000

https://gyazo.com/490b43d9d95da16741e60fca7bb5c670

Multiple items don't have Minis, so this sale can be excluded.

Sale 6) Sold for an Arcana Company Man (625 Keys)

https://backpack.tf/profiles/76561198326511775#!/compare/1619136000/1619222400

Arcana Company Man Mini

https://backpack.tf/suggestion/608dac0d238f6921fb01f9cf ~ 625 Keys