Bit high, but it seems that prices on N frames keep going higher and higher. I bought my first 28-2 for 450 about 5 years ago. That's considered damn good deal now.
OP: if you don't get it, the next guy will. It's at least 26 years old and unfired, box or not. Think about <span style="font-style: italic">that.</span>
It's no fun if you don't shoot it. Shooting won't take away from it's value as much as carrying it. I just sold one a few months ago that didn't have the original finish on it for $585. So shoot away it will still be worth what you gave for it.