Resuggesting! Thank you to Erik for letting me know of something I missed for one of the sales in the mini used here!

Item 1

https://backpack.tf/item/12973408641

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198188093413#!/compare/1683676800/1683763200

Buyer: https://backpack.tf/profiles/76561198160132476#!/compare/1686096000/1686182400

Sale #2

Sold for a double spelled Bill's Hat + a pair of earbuds (probably too low)-

Seller: https://backpack.tf/profiles/76561198160132476#!/compare/1686268800/1686355200

Buyer: https://backpack.tf/profiles/76561198042480596#!/compare/1686268800/1686355200

Sale #3

Sold for a Galactic Gateway Murderer's Motif + one key (using this to price the Motif)-

Seller: https://backpack.tf/profiles/76561198042480596#!/compare/1686355200/1686528000

Buyer: https://backpack.tf/profiles/76561198044164790#!/compare/1686268800/1686528000

Sale #4

Sold for a Haunted Ghosts Coldfront Commander (42.5 keys) + a Pro KS Knife Kit (10 keys given it was bought for that) + 2 keys + 3 refined = 43+10+2 = 55 keys-

Seller: https://backpack.tf/profiles/76561198044164790#!/compare/1686528000/1686614400

Buyer: https://backpack.tf/profiles/76561198057412106#!/compare/1686528000/1686614400

Sale #5

Untraceable-

Seller: https://backpack.tf/profiles/76561198057412106#!/compare/1686614400/1686700800

Buyer: https://backpack.tf/profiles/76561199112608744#!/compare/1686614400/1686700800

Sale #6

Sold with a Haunted Ghosts Flipped Trilby for 97 keys + 43.55 refined (won't be taking this sale given it was a dump as soon as the Kong Cone was bought)-

Seller: https://backpack.tf/profiles/76561199112608744#!/compare/1686614400/1686700800

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1686614400/1686700800

Item 2

https://backpack.tf/item/12119821720

Sale #7

Sold for 62 keys-

Seller: https://backpack.tf/profiles/76561199157058940#!/compare/1683763200/1684886400

Buyer: https://backpack.tf/profiles/76561198163615254#!/compare/1683763200/1683849600

Item 3

https://backpack.tf/item/10556560792

[b}Sale #8[/b]

Untraceable-

Seller: https://backpack.tf/profiles/76561198125501738#!/compare/1683417600/1686614400

Buyer: https://backpack.tf/profiles/76561198202209948#!/compare/1689120000/1690243200

Marketplace.tf Sales

https://marketplace.tf/items/tf2/30177;5;u18

MP.TF Sale #1

Sold for $139.99 on May 15, 2023

Keys @ $2.02

139.99/2.02 = 69.30ish keys

MP.TF Sale #2

Sold for $149.99 on July 24, 2023

Keys @ $1.95

149.99/1.95 = 76.92ish keys

MP.TF Sale #1

Sold for $149.99 on July 25, 2023

Keys @ $1.95

149.99/1.95 = 76.92ish keys

Sales @ 55, 62, 69, 77, 77

Excluding 77s given that they are above sellers, should be fine to include 55 even if its close to sellers

Taking 55-69 here