The Magnum Cylinder (value $25-$50) should not be used in that gun, Barrel is sorta small, yea , yea I know it will work, I highly doubt it is accurate.
Collector; probably not, Shooter, YES and a NEAT old 3 screw original gun. My opinion, I would rather have the OM than a NM.
Value end user might go $400 I see it more around $300 in my neck of the woods.
Here is it's near cousin aquired this July this year, with tax at Retail.