First of all, sorry for taking so long to get to this. There are a quite a few sales so im going to ignore those I can't trace without adding for confirmation.

Antlers were indate at the time of the sale, but not anymore, just to check quckly for more sales:

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https://backpack.tf/profiles/76561198105071091#!/compare/1597536000/1597622400

maybe 181 pure?

https://backpack.tf/profiles/76561198069980430#!/compare/1597536000/1597622400

https://backpack.tf/profiles/76561198136702159#!/compare/1597536000/1597622400

Bulk for PS Robo Modets

https://marketplace.tf/items/tf2/993;5;u31

$399.99 / $1.87 = 213.90 keys

= 214

gonna take 214 flat.

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214 + 8 = 222, rounding to 220.

SALE 2:

https://cdn.discordapp.com/attachments/750624046319796234/750624168692678746/image0.png

Added 10 keys for a Burning Party Phantom

Gonna just use your sale as the mini for the phantom for simplicity's sake:

https://backpack.tf/profiles/76561198252999692#!/compare/1598745600/1598832000

https://discordapp.com/channels/@me/750624046319796234/750625810238537738

C9 Kabuto (26, indate) + Frostbite Toy Talor (48.5, indate) + Burning Leadware (30.5, indate) + GFetti Party (40, see mini) + 13th Sultan (90)+ 12 pure

26 + 48.5 + 30.5 + 41 + 90 + 12 = 248

Rounding to 250

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GFetti Party Mini:

https://backpack.tf/profiles/76561198985910282#!/compare/1602540000/1602626400

40 pure.

https://bot.tf/stats/item?def=337&q=5&ef=Green%20Confetti&craft=1&aus=0&ks=0&source=browser_script

stats say 41 so gonna take 41

prolly other sales but this seems decent given the market.

PE Tank Mini:

https://marketplace.tf/items/tf2/31002;5;u10

$39.5 / $1.87 = 21.12 keys

$39 / $1.83 = 21.31 keys

Again there are more sales but these seem accurate so going with 21 flat

Sultan's Mini:

https://backpack.tf/profiles/76561198209640976#!/compare/1598832000/1598918400

Nuts Stash + Burning Sack + 6 keys

48.5 + 35.5 + 6 = 90

Stash Micro:

https://backpack.tf/profiles/76561198337734785#!/compare/1598400000/1598486400

https://bot.tf/stats/listings/Y9Q2L6KD

b/o 48.5

73 matches but some were likely not involved, regardless would cap, rounds to 49

Sack Micro

https://bot.tf/stats/listings/4PV7OPD3 - b/o 35.5

https://backpack.tf/profiles/76561198850274253#!/compare/1601251200/1601337600

36 keys

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So sale 2 is 250 - 10 = 240

SALE 3:

https://backpack.tf/suggestion/5f50fd6d37e1584396690d1b

https://backpack.tf/profiles/76561198431725617#!/compare/1598918400/1599091200

Bonzo Copper + 5

No sales there so use there, other sugg is wrong.

SALE 4:

https://backpack.tf/profiles/76561198431725617#!/compare/1601078400/1601164800

https://backpack.tf/profiles/76561198407997130#!/compare/1601078400/1601164800

Sale 5:

https://backpack.tf/profiles/76561198328282971#!/compare/1602374400/1602460800

https://backpack.tf/profiles/76561198407997130#!/compare/1602460800/1602547200

Both sales 4 & 5 need quite a few minis, however im fairly confident they would end up pretty close to where the other two sales are at. So for the sake of my sanity, I will not go into those sales fully.

TLDR: 220 - 240 should work here.