Need more info on the rifle. If its a pre accutrigger model, synthetic stock the gun is $250-$300. Add $75-$125 for the scope depending on shape and accessories.
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=292183527
I use gun broker to help check current prices, this is a n.i.b. gun but you can use it for a reference. The Leupold sells for $300.00 new, in my experience leupys don't lose much more than 10-20% of their value used (lifetime warranty) referenced natchez, ebay for new and used prices. Hope this might help.