$600 - $700 around here IF.....IF.... those are original grips and serial number to the gun. Knock $150-$100 off if they don't. Tag says "with holster" so if the holster is a good brand name (Heiser, Lawerance, S&W, etc.) maybe the $600 to $700. Assuming of course everything works mechanically, no shaken no push-off, no end play, etc.
Just a guestimate for sure based on what I see around here in Central VA.