Being the individual who originally built the car, my obviously biased opinion is that it is well worth the money. Pretty much everything done to that car during my ownership is documented somewhere on the internet so there really aren't any mysteries. The current owner has made some changes and improvements in the suspension and cosmetic departments but retained all of the original pieces.
If I could manage it, I wouldn't hesitate to buy the car back. Unfortunately, with the current exchange rate, it just doesn't make sense.
Just for fun, here is the ad from when I sold it back in 2005. Times have changed.....
http://forums.pelicanparts.com/porsche-cars-sale/226023-fs-3-6l-911sc-ruf-look.html
I didn't sell it to the current owner, the person who bought it from me back in '05 sold it to the current owner, who happens to be a good friend.
Todd