Taking on Extazi's backlog, assume previous suggestion to be the same here...

Item 1

https://backpack.tf/item/13413951884

Sale 1

https://gladiator.tf/time-machine?item=Celestial+Starburst+Close+Quarters+Cover&at=2023-09-06T15%3A47%3A00.000Z

https://backpack.tf/profiles/76561199104559253#!/compare/1693785600/1694044800

https://backpack.tf/profiles/76561198073051442#!/compare/1693872000/1694044800

160 keys

Item 2

https://backpack.tf/item/13394841381

Sale 2

https://backpack.tf/profiles/76561199221700580#!/compare/1692144000/1693872000

https://backpack.tf/profiles/76561198052901230#!/compare/1692403200/1693699200

https://gyazo.com/cb736bca314f4669662d5c6986846403

https://gyazo.com/d4eb546542247693e5d788038a92e8a6

402.50€ / 2.10€ = ~192 keys

Item 3

https://backpack.tf/item/13275140309

Sale 3

https://backpack.tf/profiles/76561198396068736#!/compare/1690329600/1690934400

https://backpack.tf/profiles/76561198009695107#!/compare/1690156800/1691539200

Bulk? + untrace

Item 4

https://backpack.tf/item/13269104148

Mp.tf sale I'll cover at the end

Item 5

https://backpack.tf/item/13269104148

Sale 4

https://backpack.tf/profiles/76561198188093413#!/compare/1695945600/1696032000

https://backpack.tf/profiles/76561198334959586#!/compare/1696032000/1696118400

https://prnt.sc/wAuRKfV06Vdp

150 keys + 2 cs agents

https://steamcommunity.com/market/listings/730/Sir%20Bloody%20Silent%20Darryl%20%7C%20The%20Professionals - ~8.5 keys

https://steamcommunity.com/market/listings/730/Michael%20Syfers%20%20%7C%20FBI%20Sniper - ~2

150 + 8.5 + 2 = ~161 keys

Item 6

https://backpack.tf/item/13395316830

Sale 5

https://gladiator.tf/time-machine?item=Celestial%20Starburst%20Close%20Quarters%20Cover&at=2023-10-06T01:10:13.000Z

https://backpack.tf/profiles/76561198157201544#!/compare/1696464000/1696550400

https://backpack.tf/profiles/76561199177561031#!/compare/1696464000/1696550400

121 keys

Sale 6

https://backpack.tf/profiles/76561199177561031#!/compare/1696982400/1697068800

https://backpack.tf/profiles/76561198115510029#!/compare/1696982400/1697500800

No clue

Mp.tf

https://marketplace.tf/items/tf2/31378;5;u286

$419.95 / $2.02 = ~208 keys (Sep 24)

$350.00 / $2.02 = ~173 keys (Oct 6)

Total Sales

121, 160, 161, 173, 192, 208

https://imgur.com/a/VRyXGdd

https://gladiator.tf/time-machine?item=Celestial+Starburst+Close+Quarters+Cover&at=2023-10-22T23%3A28%3A00.000Z

175 was unsold for quite some time

121 was a buyer dump

Rounding and taking 160 - 175 keys c: