Item 1

https://backpack.tf/item/13026978999

Sale #1

Bulk sale-

Seller: https://backpack.tf/profiles/76561198026104036#!/compare/1688515200/1688688000

Buyer: https://backpack.tf/profiles/76561198125791160#!/compare/1688601600/1688688000

Item 2

https://backpack.tf/item/12845206779

Sale #2

Sold for 13 keys + 4 refined (ID "13018356082" of the unusual match)-

Seller: https://backpack.tf/profiles/76561198850178158#!/compare/1683676800/1683763200

Buyer: https://backpack.tf/profiles/76561199196369249#!/compare/1686960000/1686960000

Item 3

https://backpack.tf/item/10079719045

Sale #3

Sold for 13 keys-

Seller: https://backpack.tf/profiles/76561198237499180#!/compare/1690588800/1690675200

Buyer: https://backpack.tf/profiles/76561198372722828#!/compare/1690243200/1690761600

Sale #4

Sold for a Purple Confetti Letch's LED + 4 keys (ID "13324079328" of the unusual matches, not usable however seeing as there's no other sales for the unusual)-

Seller: https://backpack.tf/profiles/76561198372722828#!/compare/1690761600/1690848000

Buyer: https://backpack.tf/profiles/76561198386344068#!/compare/1690588800/1690761600

Sale #5

Sold with 4 keys for a Sunbeams Wild Brim Slouch (17 keys) = 17-4 = 13 keys-

Seller: https://backpack.tf/profiles/76561198386344068#!/compare/1690761600/1690848000

Buyer: https://backpack.tf/profiles/76561198084589742#!/compare/1688947200/1690848000

Sale #6

Untraceable-

Seller: https://backpack.tf/profiles/76561198084589742#!/compare/1690848000/1690934400

Buyer: https://backpack.tf/profiles/76561198061836787#!/compare/1691020800/1691107200

Item 4

https://backpack.tf/item/9643327942

Sale #7

Untraceable-

Seller: https://backpack.tf/profiles/76561199013699360#!/compare/1678233600/1687910400

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1687824000/1687910400

Sale #8

Untraceable-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1687910400/1687996800

Buyer: https://backpack.tf/profiles/76561199193517739#!/compare/1687910400/1689033600

Item 5

https://backpack.tf/item/9550362164

Sale #9

Untraceable-

Seller: https://backpack.tf/profiles/76561198191536489#!/compare/1684886400/1686009600

Buyer: https://backpack.tf/profiles/76561199120469843#!/compare/1685664000/1686268800

Sale #10

Sold for a Screaming Tiger Taunt: Pool Party (8 keys) + a High Five! (2.1 keys, buyers price) = 8+2.1 = 10.1ish keys-

Seller: https://backpack.tf/profiles/76561199120469843#!/compare/1687478400/1690329600

Buyer: https://backpack.tf/profiles/76561199061278212#!/compare/1688860800/1690675200

Item 6

https://backpack.tf/item/9655796571

Sale #11

Untraceable-

Seller: https://backpack.tf/profiles/76561198093594661#!/compare/1687219200/1687305600

Buyer: https://backpack.tf/profiles/76561198117597416#!/compare/1688515200/1688688000

Marketplace.tf Sales

https://marketplace.tf/items/tf2/31171;5;u175

MP.TF Sale #1

Sold for $34.99 on May 23, 2023

Keys @ $2

34.99/2 = 17.50ish keys

MP.TF Sale #2

Sold for $34.99 on May 31, 2023

Keys @ $1.99

34.99/1.99 = 17.58ish keys

MP.TF Sale #3

Sold for $35.99 on July 2, 2023

Keys @ $1.99

35.99/1.99 = 18.09ish keys

MP.TF Sale #4

Sold for $35.99 on July 13, 2023

Keys @ $1.98

35.99/1.98 = 18.18ish keys

MP.TF Sale #5

Sold for $35.99 on July 25, 2023

Keys @ $1.95

35.99/1.95 = 18.46ish keys

MP.TF Sale #6

Sold for $35.99 on August 3, 2023

Keys @ $1.95

35.99/1.95 = 18.46ish keys

MP.TF Sale #7

Sold for $34.95 on August 4, 2023

Keys @ $

34.95/1.95 = 17.92ish keys

Sales @ 10, 13, 13, 13, 18, 18, 18, 18, 18, 18, 18

Taking 13-18