Assuming it's in good shape, I'd call it an average, to slightly above average deal. CMP carbines (last I looked when I got mine about 4-5 months ago) were going in the $500-$600 range in pretty good shape (based on the condition of my Saginaw service grade), and the same guns gor for anywhere from $50-$300 above CMP prices from all the other places/people selling them that I have seen.
But, it doesnt matter, becasue without pics, it never happened. Post pics or I call you a liar!