I thought I had the nicest BR in Jersey until Shlocdoc let out about his HEP XR7 PHD ABC XYZ 1 of 2 .......... you get the point, one.
That being said , they will most likely only sell to guys with larger collections who value its history / relatively simple game play to comparably priced more modern games. There are a few sitting now. Certainly not in the condition you describe.
I love mine and would not let it go for the 6K number, but to sell it ,I think you are in the mid to hi 5's. If you do want to sell, I know someone who would be interested.