I would swap those wheels out if you have something better to use them on, as they will not get you much more for the bike IMHO.
I don't think the Raleigh proprietary tubing will bring a Reynolds 531 price. So I would discount it somewhat from Jim's estimate. Maybe $225 with regular wheels, a tad more with your newer wheels.
Good looking bike! That should help it sell fast, or perhaps for a little more.