Resuggesting! Thank you to Blaze for making me aware of a new sale that would change the range here!

Item 1

https://backpack.tf/item/13487300851

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198170078402#!/compare/1694995200/1695081600

Buyer: https://backpack.tf/profiles/76561198044589114#!/compare/1694649600/1695081600

Sale #2

Sold for 15 keys (nothing traces but when you look at the histories of the keys they match with both people)

Seller: https://backpack.tf/profiles/76561198044589114#!/compare/1697068800/1697155200

Buyer: https://backpack.tf/profiles/76561198828572133#!/compare/1697068800/1697155200

Item 2

https://backpack.tf/item/13446295669

Sale #3

Only 9 keys trace in the buyer's side? Incomplete most likely-

Seller: https://backpack.tf/profiles/76561198161326655#!/compare/1694131200/1694217600

Buyer: https://backpack.tf/profiles/76561198089478585#!/compare/1693353600/1694563200

Item 3

https://backpack.tf/item/13437311832

Sale #4

A Solar Scorched Profane Puppeteer traces but nothing else does, incomplete?-

Seller: https://backpack.tf/profiles/76561198056815516#!/compare/1693699200/1693958400

Buyer: https://backpack.tf/profiles/76561199068160949#!/compare/1692230400/1694044800

Sale #5

Untraceable?-

Seller: https://backpack.tf/profiles/76561199068160949#!/compare/1694044800/1694822400

Buyer: https://backpack.tf/profiles/76561198104090803#!/compare/1693872000/1695168000

Sale #6

Bulk sale-

Seller: https://backpack.tf/profiles/76561198104090803#!/compare/1695600000/1696291200

Buyer: https://backpack.tf/profiles/76561198125791160#!/compare/1696118400/1696204800

Sale #7

Sold for 18 keys (ID "13803701253" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198125791160#!/compare/1700092800/1700179200

Buyer: https://backpack.tf/profiles/76561198123261206#!/compare/1699574400/1700092800

Item 4

https://backpack.tf/item/13376801229

Sale #8

Bulk transfer?-

Seller: https://backpack.tf/profiles/76561198870237857#!/compare/1676505600/1697068800

Buyer: https://backpack.tf/profiles/76561199102484730#!/compare/1696982400/1697068800

Sale #9

Bulk dump-

Seller: https://backpack.tf/profiles/76561199102484730#!/compare/1697068800/1697500800

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1697414400/1697500800

Sale #10

Untraceable?-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1697760000/1697846400

Buyer: https://backpack.tf/profiles/76561198046555547#!/compare/1697587200/1697932800

Item 5

https://backpack.tf/item/13348079599

Sale #11

Untraceable-

Seller: https://backpack.tf/profiles/76561198033652856#!/compare/1696636800/1696982400

Buyer: https://backpack.tf/profiles/76561199060170509#!/compare/1697500800/1698019200

Item 6

https://backpack.tf/item/13268384748

Sale #12

Untraceable?-

Seller: https://backpack.tf/profiles/76561198047258396#!/compare/1695168000/1696032000

Buyer: https://backpack.tf/profiles/76561198239564138#!/compare/1695168000/1695254400

Item 7

https://backpack.tf/item/13261632170

Ignoring the trade-backs in this history

Sale #13

Untraceable?-

Seller: https://backpack.tf/profiles/76561199103991885#!/compare/1700352000/1700438400

Buyer: https://backpack.tf/profiles/76561198120318257#!/compare/1700352000/1700438400

Item 8

https://backpack.tf/item/13256403177

Sale #14

Untraceable?-

Seller: https://backpack.tf/profiles/76561198369727670#!/compare/1693353600/1694044800

Buyer: https://backpack.tf/profiles/76561198088879177#!/compare/1693958400/1694044800

Sale #15

Untraceable?-

Seller: https://backpack.tf/profiles/76561198088879177#!/compare/1693958400/1694044800

Buyer: https://backpack.tf/profiles/76561198003408311#!/compare/1691625600/1694390400

Sale #16

Bulk sale-

Seller: https://backpack.tf/profiles/76561198003408311#!/compare/1694390400/1694908800

Buyer: https://backpack.tf/profiles/76561198022041768#!/compare/1694736000/1694822400

Sale #17

Untraceable?-

Seller: https://backpack.tf/profiles/76561198022041768#!/compare/1694908800/1694995200

Buyer: https://backpack.tf/profiles/76561198057954897#!/compare/1698969600/1699401600

Item 9

https://backpack.tf/item/13240484133

Sale #17

Untraceable-

Seller: https://backpack.tf/profiles/76561198058252581#!/compare/1694476800/1694563200

Buyer: https://backpack.tf/profiles/76561198032176942#!/compare/1694476800/1694649600

Marketplace.tf Sales

https://marketplace.tf/items/tf2/30984;5;u289

MP.TF Sale #1

Sold for $50 on October 23, 2023

Average Key Price @ $1.89ish

50/1.89 = 26.45ish keys

Unknown History

MP.TF Sale #2

Sold for $50 on December 29, 2023

Average Key Price @ $1.70ish

50/1.70 = 29.41ish keys

https://backpack.tf/item/13240484133

Sales @ 15, 18, 26, 29

Taking 18-29 here :3