That is a great buy. Four months ago I paid $400.00 for hardly fired GP100 4 inch Stainless. I have not seen a GP100 in California for and less that $400.00 regardless of condition.
I paid almost $600 for my 6" stainless GP-100 out the door about 6 months ago. Then another $50 for the "old style" grips. I love that gun. Never seen a factory round