At $550 it's a good price for that model. You say the trigger is light...how light ? Do you have a way to measure it ? It may be the result of a good action job, or it may be bubba'd some. Only way to tell is to make sure the strain screw is tight,measure the trigger pull and see where it comes out.

I remember when I was a kid they started using the Hogue grips, and they continue to do so with many models today. Not sure what dash they started that on. It wouldn't be hard to find a set of proper grips if they were before they started that, but you may prefer the Hogue's for shooting.

__________________
1st smiles,lies.Last,gunfire.