Resuggestion, thanks to Mindacos for the info!

Sale 1:

https://backpack.tf/profiles/76561198059021831#!/compare/1584057600/1584144000

https://backpack.tf/profiles/76561198113216284#!/compare/1584144000/1585008000

Sold for TW Crown(27.5) + KaW Tin Topi + Burning Bucket(71.5)

https://bot.tf/stats/listings/MQ9OZO03

B/O of 100 keys, easily caps.

Sale 2:

https://marketplace.tf/items/tf2/434;5;u14

$92.16 / $1.82 = 50.64 keys

https://backpack.tf/item/1297521356

buyers up to ~64 keys,

taking 100 flat.

NOTE:

https://backpack.tf/item/1297521356

seller has previously listed at 90 keys, watching.

https://bot.tf/stats/listings/MNRQW0Z5

Mindacos' Part:

The 90 Key seller sold for the following:

Strange Australium Pro KS Scattergun(~43 Keys), Max's Severed Head(~18 Keys) Strange Australium Pro KS SMG(~12 Keys), Strange Dead of Night(6.5 Keys), Strange AWPer Hand(9.5 Keys) and a Strange Bread Bite(2 Keys)

https://backpack.tf/profiles/76561198840760420#!/compare/1588464000/1588809600

https://backpack.tf/profiles/76561198095862827#!/compare/1588636800/1588723200

https://backpack.tf/item/8010195072 Key ID matches

*All the hats were immediately listed in marketplace. You can tell since they all went to the same bot, and proof that Wsdea was the one who listed them comes from his Dead of Night being unsold:

https://cdn.discordapp.com/attachments/466456657187176448/710838197873147904/unknown.png

The Max's head was also very likely to be involved, since the new owner got his from marketplace: https://backpack.tf/profiles/76561198022470905#!/compare/1587859200/1588723200

It likely got bought before it was able to be traced in the bot's inventory.

This was pretty complicated to figure out, but I think all the evidence adds up. 90-100 should be fine.