Resuggesting! Thank you to Lemons for letting me know that excluding the other sale was better given new buyers!

Item 1

https://backpack.tf/item/11854475167

Sale #1

Sold for 21 keys + 28.33 refined (some on seller's and some on buyer's side)-

Seller: https://backpack.tf/profiles/76561199199711319#!/compare/1686528000/1686700800

Buyer: https://backpack.tf/profiles/76561198036070209#!/compare/1686441600/1686700800

Item 2

https://backpack.tf/item/11209208674

Sale #2

Bulk sale-

Seller: https://backpack.tf/profiles/76561198112583486#!/compare/1686960000/1687046400

Buyer: https://backpack.tf/profiles/76561198140316312#!/compare/1686960000/1687046400

Sale #3

Untraceable?-

Seller: https://backpack.tf/profiles/76561198140316312#!/compare/1687219200/1687392000

Buyer: https://backpack.tf/profiles/76561198234581744#!/compare/1688601600/1690416000

MP.TF Sale #1

Sold for $59.99 on July 13, 2023

Average Key Price @ $1.96

59.99/1.96 = 30.60ish keys

https://marketplace.tf/items/tf2/31255;5;u219

Sales @ 21, 31

Taking 31 flat