Resuggesting! Thank you to Erik for letting me know of what should be done to make the range better!

Item 1

https://backpack.tf/item/12407673299

Sale #1

Sold for 23 keys + 2.22 refined-

Seller: https://backpack.tf/profiles/76561198155110999#!/compare/1682812800/1682899200

Buyer: https://backpack.tf/profiles/76561198168840544#!/compare/1682726400/1683072000

Item 2

https://backpack.tf/item/8849265816

Sale #2

Sold for 20 keys-

Seller: https://backpack.tf/profiles/76561198169939863#!/compare/1685318400/1686096000

Buyer: https://backpack.tf/profiles/76561198057521901#!/compare/1685404800/1685664000

Item 3

https://backpack.tf/item/6521681933

Sale #3

Untraceable?-

Seller: https://backpack.tf/profiles/76561198453530349#!/compare/1687910400/1687996800

Buyer: https://backpack.tf/profiles/76561198179968170#!/compare/1687996800/1690329600

Marketplace.tf Sales

https://marketplace.tf/items/tf2/30001;5;u62

MP.TF Sale #1

Sold for $54.95 on May 23, 2023

Keys @ $2

54.95/2 = 27.48ish keys

MP.TF Sale #2

Sold for $50.87 July 2, 2023

Keys @ $1.96

50.87/1.96 = 25.95ish keys

MP.TF Sale #3

Sold for $49.95 on July 24, 2023

Keys @ $1.95

49.95/1.95 = 25.62ish keys

Sales @ 20, 23, 26, 26, 27

Taking 20-23 here