Credit to !Extazi for the help

Sale 1) Antifreeze KE(ongoing price for 820-860 or an average of 840 keys) for a Scorching Flames Crones Dome and 300 keys --- 540 keys

Antifreeze KE price suggestion - https://backpack.tf/suggestion/6355ef6155b43f436c0f2f08

840 - 300 = 540 keys

https://gyazo.com/f029c74201aaba42c5d31baeca6a0bf6

Sale 2) Scorching Flames Crones Dome with 10 keys for a Nebula Universal Translator (Ongoing price at 460-560 keys or an average of 510 keys) and an It's a Secret to Everyone Tartan Spartan

https://gyazo.com/2277461096881be50c02530c193d4f30

Sale 3) Cash trade? Maybe an incomplete snapshot

https://backpack.tf/item/11298237996

Seller: https://backpack.tf/profiles/76561198085108841#!/compare/1665705600/1666483200

Buyer: https://backpack.tf/profiles/76561198123789684#!/compare/1665705600/1665964800

Sale 4) Sold along with a Scorching Hermes, Orbiting Mask of a Shaman, Scorching Flames Sober Stuntman for a Subatomic Captain Space Mann

https://backpack.tf/item/11179717526

Buyer: https://backpack.tf/profiles/76561199186313766#!/compare/1659830400/1660521600

Sale 5) Bulk

https://backpack.tf/item/7957550050

Seller: https://backpack.tf/profiles/76561198043566764#!/compare/1662076800/1662249600

Buyer: https://backpack.tf/profiles/76561198160856661#!/compare/1661990400/1662249600

Sale 6) Incomplete snapshot

https://backpack.tf/item/8639198910

Seller: https://backpack.tf/profiles/76561198160856661#!/compare/1662508800/1662681600

Buyer: https://backpack.tf/profiles/76561198263190057#!/compare/1660176000/1663113600

Sale 7) Transferred to and fro from mann co bot

https://backpack.tf/item/8639198910

Sale 8) Bulk

https://backpack.tf/item/1500726198

Seller: https://backpack.tf/profiles/76561198870452261#!/compare/1662076800/1662249600

Buyer: https://backpack.tf/profiles/76561198273331466#!/compare/1662076800/1662163200

Sale 9) Cash trade?

Seller: https://backpack.tf/profiles/76561198273331466#!/compare/1662076800/1662163200

Buyer: https://backpack.tf/profiles/76561198322957656#!/compare/1662076800/1662681600

Sale 10) Strange Catastrophic Companions plus 100 keys for Scorching Flames Crones Dome - better used there

https://backpack.tf/item/11183015143

https://backpack.tf/profiles/76561198056793885#!/compare/1660262400/1660348800

Rest of the item history looks like it was transferred to multiple alt accounts

https://backpack.tf/item/11183015143

https://backpack.tf/profiles/76561198161266740#!/compare/1664409600/1665792000

Going 540 keys flat