Countering from here given lack of response

Credits to https://backpack.tf/u/76561198096619846 and Shuffle Spy

https://marketplace.tf/items/tf2/31390;5;u297

Two in-date sales at 35.95 and 39.99

$35.95/1.69 = 21.27 keys

$39.99/1.7 = 23.52 keys

Rounding to 21 - 24 keys.

Shuffle Spy:

https://backpack.tf/profiles/76561198405601873#!/compare/1699747200/1700006400 - 18 Keys + 28 Refined

https://backpack.tf/profiles/76561198274767027#!/compare/1702512000/1702598400 - 15 Keys + White Avian Amante (>0.5 Keys)

https://backpack.tf/profiles/76561198170077501#!/compare/1709424000/1709856000 - 20 Keys

https://backpack.tf/profiles/76561198121518467#!/compare/1704844800/1705017600 - 12 Keys

https://backpack.tf/profiles/76561198349848918#!/compare/1702080000/1702166400 - 16 Keys

https://backpack.tf/profiles/76561198965166014#!/compare/1699747200/1700092800 - Maybe 20 Keys, but the histories don't match

https://backpack.tf/profiles/76561198111925333#!/compare/1699747200/1699833600 - 20 Keys

https://backpack.tf/profiles/76561198188093413#!/compare/1702512000/1702598400 - 16 Keys

https://imgur.com/a/I438hdR - New seller at 20 Keys. This is the person that paid 23.5 on Marketplace.

https://backpack.tf/item/13677372244

16 - 21 would work here with the person that paid 23.5 now listing this for less.