Many thanks to Elixir for supplying me with the proof to use in this!

Item 1

https://backpack.tf/item/6304868328

Sale #1

Sold with 185 keys for a spelled Harvest Moon Executioner (1050 keys) = 1050-185 = 865ish keys-

Seller: https://backpack.tf/profiles/76561198074895734#!/compare/1696118400/1696291200

Buyer: https://backpack.tf/profiles/76561199367190793#!/compare/1695772800/1696377600

Extra Proof: https://imgur.com/a/zz1X6LY

Item 2

https://backpack.tf/item/6288059010

Sale #2

Sold for Something Burning This Way Comes Attendant + a Strange Ghastlierest Gibus + 100 keys (not usable, no sales for the Attendant)-

Seller: https://backpack.tf/profiles/76561198049884052#!/compare/1695859200/1695945600

Buyer: https://backpack.tf/profiles/76561198077649123#!/compare/1687737600/1695945600

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Mini for the Something Burning This Way Comes Attendant

Item 1

https://backpack.tf/item/2062491170

Sale #1

Untraceable?-

Seller: https://backpack.tf/profiles/76561198058252581#!/compare/1689811200/1690848000

Buyer: https://backpack.tf/profiles/76561198235697740#!/compare/1691107200/1691193600

Sale #2

Bulk sale for a Misty Skull Shellmet-

Seller: https://backpack.tf/profiles/76561198235697740#!/compare/1695859200/1695945600

Buyer: https://backpack.tf/profiles/76561198049884052#!/compare/1695859200/1695945600

Item 2

https://backpack.tf/item/2050267390

Sale #3

Sold for a Burning Flames Bone Dome + a duped Cloudy Moon Attendant (not usable, no usable sales for the Attendant)-

Seller: https://backpack.tf/profiles/76561198097171432#!/compare/1694217600/1694476800

Buyer: https://backpack.tf/profiles/76561198167302164#!/compare/1694304000/1694390400

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Mini for the duped Cloud Moon Attendant

Item 1

https://backpack.tf/item/1215177655

Sale #1

This sale never happened, just shows up this way because its duped-

Seller: https://backpack.tf/profiles/76561198167302164#!/compare/1694304000/1694390400

Buyer: https://backpack.tf/profiles/76561198091312461#!/compare/1688947200/1694908800

Sale #2

Bulk sale-

Seller: https://backpack.tf/profiles/76561198167302164#!/compare/1694304000/1694390400

Buyer: https://backpack.tf/profiles/76561198097171432#!/compare/1694217600/1694476800

Sale #3

This sale never happened just like sale #1-

Seller: https://backpack.tf/profiles/76561198091312461#!/compare/1694908800/1696204800

Buyer: https://backpack.tf/profiles/76561198097171432#!/compare/1694217600/1694476800

Sale #4

This sale is just like the others, never happened because its duped-

Seller: https://backpack.tf/profiles/76561198097171432#!/compare/1697155200/1697241600

Buyer: https://backpack.tf/profiles/76561198141753331#!/compare/1696723200/1697328000

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Sale #4

Bulk sale with three unusuals for 800 keys (ID "13514032831' of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198167302164#!/compare/1694304000/1694390400

Buyer: https://backpack.tf/profiles/76561198244962432#!/compare/1694304000/1694390400

Sale #5

Sold for a duped Poisoned Shadows Birdcage + an Isotope Spec KS Gourdy Green Flame Thrower (FT) + an Isotope Pro KS Gourdy Green Detonator (WW) + a Cool Team Serviced Sniper Rifle (MW) (this sale is not usable given that there's no usable sales for the Birdcage)-

Seller: https://backpack.tf/profiles/76561198244962432#!/compare/1696377600/1696464000

Buyer: https://backpack.tf/profiles/76561198044301165#!/compare/1696291200/1696464000

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Mini for the duped Poisoned Shadows Birdcage

Item 1

https://backpack.tf/item/2044694391

History is duped so it might be a bit messy at the end

Sale #1

Probably gambled in bulk, untraceable regardless-

Seller: https://backpack.tf/profiles/76561199161916038#!/compare/1695945600/1696032000

Buyer: https://backpack.tf/profiles/76561199139394142#!/compare/1695859200/1695945600

Sale #2

Pretty sure this was gambled back and forth given that the three unusuals that show up as being "traded" were already in the seller's inventory beforehand-

Seller Inv 1: https://backpack.tf/profiles/76561199139394142#!/compare/1696032000/1696118400

Seller Inv 2: https://backpack.tf/profiles/76561199139394142#!/compare/1696118400/1696204800

Buyer: https://backpack.tf/profiles/76561198044301165#!/compare/1695859200/1696204800

Sale #3

This sale didn't happen, it just shows this way since its duped-

Seller: https://backpack.tf/profiles/76561198044301165#!/compare/1696291200/1696464000

Buyer: https://backpack.tf/profiles/76561198086948995#!/compare/1696291200/1696636800

Sale #4

Bulk sale-

Seller: https://backpack.tf/profiles/76561198244962432#!/compare/1696377600/1696464000

Buyer: https://backpack.tf/profiles/76561198044301165#!/compare/1696291200/1696464000

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Only sale @ 865 keys

Rounding and taking 870 here