I personally wouldn't pay that much for that wheel. I think the wheel can be bought from various suppliers for around $300, not sure how much the hub is, though.
But mainly, I've seen that wheel and am unimpressed by the quality. Also, I like the embossed crest on the factory wheel, but not the "stick on" crest on the aftermarket one.
THIS was a great deal on a factory version with hub, for $475! Of course, you know it was a steal when it sold in a matter of minutes. He probably could have gotten $700_ for it. You just missed it!
http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/796259-930s-steering-wheel-hub-new-475-a.html