I have a early sig 556 that I believe they called the patrol model it has the fishgill hand guard with the rail on each side, and the m4 non folding stock. It takes AR magazines. I bought it back when they were expensive. I know they have come way down in value but I don't know what a fair price is in today's market . Serious question, what would a fair asking price be in today's market . It's in like new condition fired less than 200 rounds. Can anyone be of any help?