Aces High Allbrero for the Private Eye?
1 of 1 on market, only 5 in existence.
Not too long a history, super clean etc.
Orbit effects circles perfectly around the rim of the hat, and is thematic due to the gambling/partylike setting of the hat.
backpack.tf price of 6.16 buds, though that sale was a QS so it'd probably go for higher. Many thanks!