Resuggesting as the previous suggestion was missing MP sales.

Guy I bought it from was asking for 18 pure. I offered "mixed pay"

11 keys + 2x summer 2024 cosmetic key @ 1.15 key + strange cranial Cowl @ 4.75 = 18.05 accepted price.

Proof of purchase

Me: https://backpack.tf/profiles/76561198054432412#!/compare/1724544000/1724630400

Seller: https://backpack.tf/profiles/76561198094818081#!/compare/1724544000/1724630400

MP sales respectively at +/- $29,99 (thanks to "Not Real")

3 recent sales on MP for $29.99: https://marketplace.tf/items/tf2/1162;5;u3095

Jul 16: 17.64 Keys (Keys @$1.7), rounds to 18

Aug 5: 17.13 keys (Keys @$1.75), rounds to 17

Aug 17: 16.38 Keys (Keys @$1.83), rounds to 16

Taking 16-18 as range

Cheers,

Rubo