They cost relatively nothing to own these days...though the upkeep for the air suspension and all the electronics in the car will quickly surpass the purchase price...
Also the description of W12 being 2 V with one leg inside the other is just weird...its 2 VR6s joined at the crank...
Similar period VW product that's more intriguing(and no less costly to own) is the V10 TDI Touareg....
And considering the weight difference, the A8 is probably the better car..
University of Toronto Formula SAE Alumni 2003-2007
Formula Student Championship 2003, 2005, 2006
www.fsae.utoronto.ca