Huge credits to danny for sales and minis from previous suggestion, and Ancientpear for additional evidence: https://backpack.tf/suggestion/61772a2ec707655528485ffe

Xergoyf:

The Brain bucket mini isn't right, a Purple Energy Towering Titanium Pillar of Hats is involved in the sale https://backpack.tf/item/10615779694

I haven't counted keys so I don't know if all 83 keys are involved, compares are a bit messy. There also appear to be new sales, but honestly I would just take 147 flat since that is what AncientPear paid, and he was the one who upgraded to the Fukaamigasa. Same logic can be applied to the 270 rack sale, as otherwise it would be better to use the new suggestion on that.

Sale 1:

https://backpack.tf/profiles/76561198163560309#!/compare/1634083200/1634169600

https://backpack.tf/profiles/76561198220098345#!/compare/1634083200/1634169600

20k + Blizzardy Rack + C.H Mining light

Given rack is now outdated, using the 270k sale Ancientpear provided https://imgur.com/a/clUdCGx.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

MINI FOR THE MINING LIGHT

https://backpack.tf/profiles/76561198059874094#!/compare/1632700800/1632787200

https://backpack.tf/profiles/76561198220098345#!/compare/1632700800/1632787200

147 keys

https://backpack.tf/profiles/76561198054642670#!/compare/1634256000/1634428800

Mining light = (101+ 47)/2 = 124

Taking 147 flat here as Xergoyf suggested.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

First sale: 20 + 270 + 147 = 437 keys

Sale 2:

https://backpack.tf/profiles/76561198220098345#!/compare/1635033600/1635120000

https://backpack.tf/profiles/76561198110834357#!/compare/1635033600/1635120000

220k + phos hustler + sunbeam bootleg billycock + spec ks aussie scattergun + aussie grenade launcher + bubbling pomade +burly beast + strange dynamite abs + Power Surge Trencher's Topper

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Phosphorous hustler in date for 77.5, rounding to 78 - Ancientpear mentioned a 120k sale but I don't see it in compares (but even if updated it would fit in range)

Sunbeams bootleg in date for 29

Bubbling Pomade in date for 15 - just barely out of date, new sales not really verifiable:

[https://backpack.tf/item/9275088447

https://backpack.tf/profiles/76561198110834357#!/compare/1635033600/1635120000

https://backpack.tf/profiles/76561198220098345#!/compare/1635033600/1635120000

bulk for arcana fukaa

https://backpack.tf/profiles/76561198220098345#!/compare/1635465600/1635552000

https://backpack.tf/profiles/76561198860735519#!/compare/1635552000/1635638400

https://gladiator.tf/listings/617c828077cfd2307422c544

not sure if traceable, snapshot suggests 17k

https://backpack.tf/item/7034997159

https://backpack.tf/profiles/76561198137201553#!/compare/1564272000/1632528000

untrace

https://backpack.tf/profiles/76561198135388328#!/compare/1634601600/1634688000

untrace

then to cs.trade

https://backpack.tf/profiles/76561198310590737#!/compare/1637280000/1637366400

https://backpack.tf/profiles/76561199139031975#!/compare/1637280000/1637366400

possible 15k?

some movement then dump to bot] - so just taking 15 here

Burly Beast in date for 17.4, rounding to 17

Strange Dynamite abs Sellers at 12 buyers at 10, indate at 9.4 and 6x $27.99 sales in the past month on mp.tf. Taking 10 for simplicity (honestly it wouldn’t really matter)

Power surge topper in date at 16.5, round 17.

Spec Ks Aussie Scatter, 41-43 at time https://gladiator.tf/listings/61751f8b6fe7cd3f1d508c00, so 42k

https://gladiator.tf/sales?item=Strange%20Specialized%20Killstreak%20Australium%20Scattergun&at=2021-10-25T07:25:17.643Z

Ks Aussie Grenade, ~22 at time https://gladiator.tf/listings/6174e003941d3d5b5b382114, so 22k

https://gladiator.tf/sales?item=Strange%20Killstreak%20Australium%20Grenade%20Launcher&at=2021-10-24T07:27:26.264Z

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

220 + 78 + 29 + 15 + 17 + 10 + 17 + 42 + 22 = 450 keys

Sale 3:

https://backpack.tf/profiles/76561198110834357#!/compare/1635984000/1636588800

https://backpack.tf/profiles/76561198228991628#!/compare/1636502400/1636588800

300 keys

Dupe Harvest Moon Hermes:

https://backpack.tf/profiles/76561198110834357#!/compare/1637280000/1637452800

https://backpack.tf/profiles/76561198129402515#!/compare/1637366400/1637452800

https://gladiator.tf/listings/61982bc637690aa5ff4f9eef

Buyer sold for 240 keys

Strange Stunning Thousand-Yard Stare: 30 keys, https://backpack.tf/suggestion/61ac6448557f7957e1688163

300 + 240 + 30 = 550 keys

B/O at 700 keys so no cap: https://gladiator.tf/listings/61832fac6706d5b56cfcaea6

Sales:

437, 450, 550

Rounding to 440-550.