Thanks for the help Blaze!

1) Stormy 13th Hour Frenchmen Beret plus 150 keys for Burning Flames Hong Kong Cone (Credit to Kolt) --- 315 keys

Burning Flames Hong Kong Cone priced at 465 keys (Credit to Bandai) https://next.backpack.tf/suggestions/63312e1cf68cdfb8390ac21d

https://next.backpack.tf/item/11842772302

Seller: https://next.backpack.tf/profiles/76561198091691682/compare?from=1657411200&to=1657497600

Buyer: https://next.backpack.tf/profiles/76561198244962432/compare?from=1657411200&to=1657497600

465 - 150 = 315 keys

2) No snapshot

https://next.backpack.tf/item/11842772302

Seller: https://next.backpack.tf/profiles/76561198244962432/compare?from=1662508800&to=1662595200

Buyer: https://next.backpack.tf/profiles/76561198064490301/compare?from=1662508800&to=1662681600

3) sold with 70 keys + spelled Strange Killstreak Rust Botkiller Rocket Launcher Mk.I for Demonflame Ze Goggles + spelled The Bruiser's Bandanna --- ~ 385 keys

https://gladiator.tf/time-machine?item=Stormy%2013th%20Hour%20Frenchman%27s%20Beret&at=2022-09-07T10:52:55.000Z

https://backpack.tf/profiles/76561198244962432#!/compare/1662595200/1662854400

https://backpack.tf/profiles/76561198064490301#!/compare/1662854400/1663286400 -

https://backpack.tf/stats/Unusual/Ze%20Goggles/Tradable/Craftable/80

https://gladiator.tf/time-machine?item=Demonflame+Ze+Goggles&at=2022-12-06T01%3A10%3A00.000Z B/O 419 keys = ~ 420 keys

Mini for spelled GGFP The Bruiser's Bandanna- 40 Keys

gangreen bandana:

https://backpack.tf/profiles/76561198009471724#!/compare/1667520000/1667779200

https://backpack.tf/profiles/76561197998427243#!/compare/1659484800/1668124800 - sold for 40 keys

https://backpack.tf/classifieds?item=Bruiser%27s%20Bandanna&quality=6&tradable=1&craftable=1&australium=-1&killstreak_tier=0

https://gladiator.tf/time-machine?item=The+Bruiser%27s+Bandanna&at=2022-12-06T01%3A18%3A00.000Z B/O 14.5 Keys

Mini for spelled Pumpkin Bombs Strange Killstreak Rust Botkiller - 3 keys

https://backpack.tf/classifieds?item=Rust%20Botkiller%20Rocket%20Launcher%20Mk.I&quality=11&tradable=1&craftable=1&australium=-1&killstreak_tier=1

So 420 - 70 + 40 - 3 = 385 keys

Going 315 - 385 keys or an average of 350 keys flat