If you sell them individually, you get more $$$! A fair asking price would be around $600, but I am not sure you can find one who will shell out that much for the set. You would have a much better chance of getting a fair price, if you try to sell to those who want to finish their collection and only need specific cards.
Don't go by the prices on ebay...maby the "best offer" option with a $1000 "buy it now" would be prudent.
I am happy to be able to keep my RoS MW set and not to gauge its market value. If I were you, I'd keep it.