You can buy a new ss 308, for $600 online from several retailers.
You're probably better off separating the rifle and scope. Sell each one, and you will likely get more than you would as a package deal.
Scope used on ebay somewhere in the area of $100-$160 depending on magnification - rifle $450 - $525 in private sale-- would be my guess. Of course it might bring more if you sold it close to hunting season.