Item 1

https://backpack.tf/item/12723772871

Sale #1

Bulk sale-

Seller: https://backpack.tf/profiles/76561198139531991#!/compare/1656460800/1684195200

Buyer: https://backpack.tf/profiles/76561198318065526#!/compare/1684195200/1684368000

Item 2

https://backpack.tf/item/12178338074

Sale #2

Sold for 155 keys-

Seller: https://backpack.tf/profiles/76561198042499763#!/compare/1685232000/1685404800

Buyer: https://backpack.tf/profiles/76561198096519024#!/compare/1685318400/1685664000

Sale #3

Bulk sale-

Seller: https://backpack.tf/profiles/76561198096519024#!/compare/1686182400/1686441600

Buyer: https://backpack.tf/profiles/76561198140565712#!/compare/1686355200/1686441600

Sale #4

Sold for a Death at Dusk Engineer's Cap (not usable, no other usable sales for the Cap so probably better used there)-

Seller: https://backpack.tf/profiles/76561198140565712#!/compare/1686528000/1686700800

Buyer: https://backpack.tf/profiles/76561198066684198#!/compare/1686614400/1686700800

Sale #5

Bulk sale-

Seller: https://backpack.tf/profiles/76561198066684198#!/compare/1687132800/1687305600

Buyer: https://backpack.tf/profiles/76561198028970071#!/compare/1687132800/1687478400

Sale #6

Sold for a Strange Burning Flames Airdog + a Strange Spec KS High Roller's Rocket Launcher (FN) + a Kill-a-Watt Bear Necessities + a Skill Gotten Gains Taunt: The Mannbulance! + a Laugh-O-Lantern Calamitous Cauldron + a Showstopper Taunt: The Profane Puppeteer + Showstopper Taunt: Soldier's Requiem + a Showstopper Taunt: Panzer Pants + a Showstopper Taunt: The Fubar Fanfare + a Clairvoyance Mann-O-War + a Strange Hot Candy Coated Shahanshah (FT) + Strange Breadcrab + a Showstopper Taunt: The Killer Solo (can't really use this here, the Strange Airdog and the Strange Hot Shahanshah don't have any other usable sales and I can't really base their prices out of anything)-

Seller: https://backpack.tf/profiles/76561198028970071#!/compare/1687478400/1687996800

Buyer: https://backpack.tf/profiles/76561198069613225#!/compare/1687910400/1687996800

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31295;5;u265

MP.TF Sale #1

Sold for $620 on May 14, 2023

Keys @ $2.02

620/2.02 = 306.93ish keys

MP.TF Sale #2

Sold for $609.99 on August 14, 2023

Keys @ $2.05

609.99/2.05 = 297.56ish keys

Sales @ 155, 298, 307

Rounding up and taking 300 flat