Item 1

https://backpack.tf/item/7956225760

Sale #1

Sold for 20 keys + 43 refined (keys and metal in buyer's side, maybe some scrap too but this is enough to make it 21 keys)-

Seller: https://backpack.tf/profiles/76561199072654974#!/compare/1686528000/1686614400

Buyer: https://backpack.tf/profiles/76561198098107584#!/compare/1686528000/1686700800

Item 2

https://backpack.tf/item/3224955057

Sale #2

Sold for 19 keys + 69.11 refined (keys in buyer's side and refined in seller's side)-

Seller: https://backpack.tf/profiles/76561198337734785#!/compare/1688169600/1688256000

Buyer: https://backpack.tf/profiles/76561198071588645#!/compare/1688256000/1688515200

Item 3

https://backpack.tf/item/2226330878

Sale #3

Sold for 17 keys (ID "13104649175" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198453530349#!/compare/1685664000/1685750400

Buyer: https://backpack.tf/profiles/76561199160703098#!/compare/1683763200/1687219200

Item 4

https://backpack.tf/item/7956531546

Sale #4

Seems to have sold for 20 refined, but the rest of the trade doesn't show up so incomplete and unusable-

Seller: https://backpack.tf/profiles/76561198841279602#!/compare/1690416000/1690502400

Buyer: https://backpack.tf/profiles/76561199112351087#!/compare/1689897600/1690934400

Sale #5

Untraceable-

Seller: https://backpack.tf/profiles/76561199112351087#!/compare/1690934400/1691193600

Buyer: https://backpack.tf/profiles/76561198850121720#!/compare/1690848000/1690934400

Marketplace.tf Sales

https://marketplace.tf/items/tf2/30026;5;u62

MP.TF Sale #1

Sold for $43.99 on June 8, 2023

Keys @ $1.99

43.99/1.99 = 22.11ish keys

MP.TF Sale #2

Sold for $43.55 on August 9, 2023

Keys @ $1.98

43.55/1.98 = 21.99ish keys

MP.TF Sale #3

Sold for $43.55 on August 10, 2023

Keys @ $1.97

43.55/1.97 = 22.11ish keys

Sales @ 17, 20, 21, 22, 22, 22

Taking 20-22 here