Resuggesting! Thank you to Blaze for letting me know of the new range I should use and the new sales that have happened!

Item 1

https://backpack.tf/item/12549655505

Sale #1

Sold with 18 keys for a Cold Cosmos Undercover Brolly (39 keys) = 39-18 = 21 keys-

Seller: https://backpack.tf/profiles/76561198387108835#!/compare/1693440000/1693872000

Buyer: https://backpack.tf/profiles/76561198125791160#!/compare/1693785600/1693872000

Sale #2

Sold for 24 keys (ID "13871076747" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198125791160#!/compare/1701648000/1701734400

Buyer: https://backpack.tf/profiles/76561198033521359#!/compare/1701734400/1701820800

Item 2

https://backpack.tf/item/11556761385

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561198051159272#!/compare/1691625600/1692057600

Buyer: https://backpack.tf/profiles/76561198260467278#!/compare/1691452800/1692144000

Sale #4

Untraceable-

Seller: https://backpack.tf/profiles/76561198260467278#!/compare/1692835200/1692921600

Buyer: https://backpack.tf/profiles/76561198215826393#!/compare/1692662400/1693872000

Item 3

https://backpack.tf/item/9999514459

Sale #5

Untraceable, probably was bought from STN and instantly dumped to quicksell.store-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1695945600/1696032000

Buyer: https://backpack.tf/profiles/76561199084784906#!/compare/1696118400/1696204800

Sale #6

Untraceable?-

Seller: https://backpack.tf/profiles/76561199084784906#!/compare/1696550400/1696636800

Buyer: https://backpack.tf/profiles/76561198057083851#!/compare/1696550400/1696636800

Sale #7

Untraceable?-

Seller: https://backpack.tf/profiles/76561198057083851#!/compare/1702684800/1702771200

Buyer: https://backpack.tf/profiles/76561198091502579#!/compare/1702684800/1702771200

Item 4

https://backpack.tf/item/9837580950

Sale #8

Only three keys trace when using IDs, incomplete and untraceable-

Seller: https://backpack.tf/profiles/76561199057187154#!/compare/1691193600/1691366400

Buyer: https://backpack.tf/profiles/76561198108880110#!/compare/1686873600/1691625600

Sale #9

Untraceable?-

Seller: https://backpack.tf/profiles/76561198108880110#!/compare/1699142400/1699315200

Buyer: https://backpack.tf/profiles/76561198202572818#!/compare/1699401600/1699488000

Sale #10

Sold for 21 keys (ID "13777523834" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198202572818#!/compare/1699401600/1699488000

Buyer: https://backpack.tf/profiles/76561198086688141#!/compare/1699401600/1699488000

Sale #11

Sold for 21 keys + 10 refined (ID "13781261088" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198086688141#!/compare/1699488000/1699574400

Buyer: https://backpack.tf/profiles/76561198310149626#!/compare/1699488000/1699574400

Sale #12

Only 16 keys match histories in the buyer's side, incomplete?-

Seller: https://backpack.tf/profiles/76561198310149626#!/compare/1699574400/1699660800

Buyer: https://backpack.tf/profiles/76561198001290284#!/compare/1699574400/1699920000

Item 5

https://backpack.tf/item/10674411664

Sale #13

Sold for 22 keys (ID "13738390715" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198244962432#!/compare/1698624000/1698710400

Buyer: https://backpack.tf/profiles/76561197985538782#!/compare/1698624000/1698710400

Sale #14

Untraceable? This was a SCM sale-

Seller: https://backpack.tf/profiles/76561197985538782#!/compare/1702944000/1703030400

Buyer: https://backpack.tf/profiles/76561198047491012#!/compare/1702339200/1702944000

Item 6

https://backpack.tf/item/9988224614

Sale #15

Sold for 19 keys (all the keys in the buyer's side match histories)-

Seller: https://backpack.tf/profiles/76561198841279602#!/compare/1699228800/1699315200

Buyer: https://backpack.tf/profiles/76561198248998786#!/compare/1699142400/1699315200

Sale #16

Untraceable?-

Seller: https://backpack.tf/profiles/76561198248998786#!/compare/1702771200/1702944000

Buyer: https://backpack.tf/profiles/76561198053295214#!/compare/1702080000/1703030400

Item 7

https://backpack.tf/item/9845653559

Sale #17

Untraceable?-

Seller: https://backpack.tf/profiles/76561199091084794#!/compare/1700438400/1701561600

Buyer: https://backpack.tf/profiles/76561198066174451#!/compare/1700524800/1701216000

Item 8

https://backpack.tf/item/9728334599

Ignoring the transfer between quicksell.store bots

Sale #18

Sold for a Resonation Fried Batter + an Amygdala Splitting Headache (either too high or better not to use given it was a dump and bots take different prices for items)-

Seller: https://backpack.tf/profiles/76561198077072680#!/compare/1703462400/1703548800

Buyer: https://backpack.tf/profiles/76561199110809353#!/compare/1703462400/1703548800

Item 9

https://backpack.tf/item/9629094519

Sale #19

Untraceable?-

Seller: https://backpack.tf/profiles/76561198047673699#!/compare/1698969600/1699056000

Buyer: https://backpack.tf/profiles/76561198140316312#!/compare/1701648000/1701734400

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31169;5;u164

MP.TF Sale #1

Sold for $59.99 on July 26, 2023

Average Key Price @ $1.95ish

59.99/1.95 = 30.76ish keys

Unknown History

MP.TF Sale #2

Sold for $59.99 on August 9, 2023

Average Key Price @ $2ish

59.99/2 = 29.99ish keys

Unknown History

MP.TF Sale #3

Sold for $59.99 on August 11, 2023

Average Key Price @ $2.01ish

59.99/2.01 = 29.84ish keys

Unknown History

MP.TF Sale #4

Sold for $59.99 on August 22, 2023

Average Key Price @ $2ish

59.99/2 = 29.99ish keys

Unknown History

MP.TF Sale #5

Sold for $59.99 on September 9, 2023

Average Key Price @ $2.02ish

59.99/2.02 = 29.69ish keys

Unknown History

MP.TF Sale #6

Sold for $59.99 on September 21, 2023

Average Key Price @ $2.03ish

59.99/2.03 = 29.55ish keys

Unknown History

MP.TF Sale #7

Sold for $59.99 on October 7, 2023

Average Key Price @ $2.02ish

59.99/2.02 = 29.69ish keys

Unknown History

MP.TF Sale #8

Sold for $59.99 on October 15, 2023

Average Key Price @ $2.01ish

59.99/2.01 = 29.84ish keys

https://backpack.tf/item/9760799171

MP.TF Sale #9

Sold for $59.99 on December 3, 2023

Average Key Price @ $1.75ish

59.99/1.75 = 34.28ish keys

Unknown History

SCM Sale #1

Sold for $54 on December 19, 2023 at 2 PM

Average Key Price @ $2.12ish

54/2.12 = 25.47ish keys

Proof of Sale: https://imgur.com/8YXQcAS

Sales @ 16?, 19, 21, 21, 21, 22, 24, 25, 30, 30, 30, 30, 30, 30, 30, 31, 34

Taking 21-30 here :3