Resuggesting from https://backpack.tf/suggestion/612b8ef1a082ac69384925a5

Thanks to lemons for all the help!

History 1:

https://backpack.tf/item/6275858433

Sale 1:

https://backpack.tf/profiles/76561197996307844#!/compare/1616630400/1626652800

https://backpack.tf/profiles/76561197994697258#!/compare/1626566400/1626652800

bulk

History 2:

https://backpack.tf/item/10539028042

Sale 1 and 2:

https://imgur.com/a/A5ARZ0T

110 keys and 165 keys

Sale 3:

https://backpack.tf/profiles/76561198047681469#!/compare/1630972800/1631491200

https://backpack.tf/profiles/76561197994697258#!/compare/1630886400/1630972800

49 keys of random junk + Strange Prof KS Gunslinger (132) + HFire Strange Prof KS Festive Flame Thrower (36) + KWatt Connoisseur's Cap (18) + 140 cad (68) = 303

https://ibb.co/PwHkDVh

https://gyazo.com/254094a33bd79b934224f230685e890a

caps at 250 keys

Keys

https://forums.backpack.tf/topic/77764-%F0%9F%92%B8-buying-keys-for-cash%F0%9F%92%B2-selling-keys-~-164%F0%9F%92%B2-%F0%9F%A4%9D-trusted-trader%E2%9C%85-110trust%F0%9F%A4%9Dpaypalbankukcoinbasecashapprevolut%F0%9F%92%B3negotiable%F0%9F%92%AC/ $1.64

https://forums.backpack.tf/topic/76871-buying-keys-160-each-buying-special-keys-ref-tools-backpacks-paypal/ $1.60

https://forums.backpack.tf/topic/78610-buying-keys-160-and-backpacks-with-paypal/ $1.60

https://forums.backpack.tf/topic/78488-buying-keys-for-164-paypal/ $1.64

https://forums.backpack.tf/topic/76750-buying-keys-at-161-usd-paypal-bulk-sellers-welcome/ $1.61

https://forums.backpack.tf/topic/78873-%F0%9F%94%A5selling-via-paypal%E3%80%8Emann-keys-161-5000-stock%E3%80%8F%E3%80%8Etour-of-duty-tickets-075%E3%80%8F15trusts%E2%9C%85/ $1.61

https://forums.backpack.tf/topic/77090-buying-up-to-1200-keys-163-with-paypal/ $1.63

$1.64

$1.64

$1.63

$1.61

$1.61

$1.60

Going to take keys at $1.62

https://media.discordapp.net/attachments/768760572819931140/891682704972722206/unknown.png

110.65/1.62 = 68.3 keys

Kwatt Connoisseur's Cap

https://marketplace.tf/items/tf2/394;5;u56

$31.99 / $1.81 = 17.67 keys

Taking 18 keys

Hween Fire Strange Festive Flame Thrower (No usable spell sales so taking unspelled price)

https://marketplace.tf/items/tf2/659;11;kt-3

$64.99 / $1.82 = 35.71 keys x2

Taking 36 keys

Strange Prof KS Gunslinger

https://gladiator.tf/sales?item=Strange%20Professional%20Killstreak%20Gunslinger&at=2021-09-7T13:15:31.902Z

134 keys

https://steamcommunity.com/market/listings/440/Strange%20Professional%20Killstreak%20Gunslinger

141, 128, 120, 130, 142, 143

https://marketplace.tf/items/tf2/142;11;kt-3

$249.99 / $1.81 = 138.12 keys x2

$259.99 / $1.81 = 143.64 keys

$299.99 / $1.82 = 164.83 keys x2 (outlier)

120-144 == 132 keys

[marketplace sales without history]

https://marketplace.tf/items/tf2/16301;11;w1;pk301

$525 / $1.82 = 288.46 keys

Sales:

110

165

250

288

110 is low, 288 is excluded because of the 1 month old listing at 250

https://gyazo.com/254094a33bd79b934224f230685e890a

That leaves us with a 165-250 key range