Nice, clean revolver. Standard trigger, semi-target hammer, nickel looks fully intact, side plate screws not buggered. Slight turn line. GA "speedloader cut" target stocks have nice color and look perfect. Nickel adds a premium, I'd say $900-$1000. It would be more if an earlier dash, maybe, and a bit more for a 4" barrel, but it's still P&R, and there is little to no difference between it and a dash-3 except timeframe of manufacture. Yeah, SCSW says 1980.
Just a SWAG on my part, based on what I gave for a blued 4" dash 3 several years ago, in similar condition.