Ressugesting! Thank you to Bentry Suster for letting me know of their new sale!

Item 1

https://backpack.tf/item/10886649411

Sale #1

Bulk transfer?-

Seller: https://backpack.tf/profiles/76561199336023168#!/compare/1687392000/1688515200

Buyer: https://backpack.tf/profiles/76561198050376470#!/compare/1679443200/1690934400

Item 2

https://backpack.tf/item/4659920194

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1685836800/1685923200

Buyer: https://backpack.tf/profiles/76561198453530349#!/compare/1685836800/1685923200

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561198453530349#!/compare/1686700800/1686787200

Buyer: https://backpack.tf/profiles/76561199111073161#!/compare/1686700800/1686787200

Sale #4

Some refined matches histories but nothing on the seller's side, untraceable-

Seller: https://backpack.tf/profiles/76561199111073161#!/compare/1687824000/1687910400

Buyer: https://backpack.tf/profiles/76561198291712570#!/compare/1680220800/1687910400

Item 3

https://backpack.tf/item/2758899070

Sale #5

Sold for 47 keys + 0.11 refined (ID "13174527633" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198054601655#!/compare/1687392000/1687478400

Buyer: https://backpack.tf/profiles/76561198311498888#!/compare/1687392000/1687478400

Sale #6-7

Tradebacks-

https://backpack.tf/item/2758899070

Sale #8

Sold for 54 keys + 1.55 refined-

https://imgur.com/nJ1HhYF

Item 4

https://backpack.tf/item/2718458563

Sale #9

Bulk sale-

Seller: https://backpack.tf/profiles/76561198382668057#!/compare/1683590400/1685923200

Buyer: https://backpack.tf/profiles/76561198105071091#!/compare/1683331200/1683590400

Marketplace.tf Sales

https://marketplace.tf/items/tf2/1118;5;u3071

MP.TF Sale #1

Sold for $129.99 on June 13, 2023

Keys @ $1.98

129.99/1.98 = 65.65ish keys

MP.TF Sale #2

Sold for $129.99 on July 25, 2023

Keys @ $1.95

129.99/1.95 = 66.66ish keys

Sales @ 47, 54, 66, 67

Taking 54-67 here