The shop I used to work at saw them somewhat regularly - the caliber is still popular among certain circles.
The gun's not common, but I saw probably one a year come through the doors. In practice, the book markup on it didn't hold - it's an extremely niche gun.
A NIB model or LNIB would be worth the markup IMO if you had a similar collection of other variants, but anything else can probably be talked down or just waited for if you're patient.