Paolo,
Looks like most of the Porsches are sold.
There is a Porche 956 (might be a 962) here in Portland Oregon USA for sale by Monte Shelton Motors for $450K. His son Neil tried to run it in the Portland Rose Cup races (which Monte ran the car in previous years), and someone determined it was illegal for the class of cars allowed to compete, so he had to park it. I have no affiliation with this car, but I thought I would let someone know about the car.
For me, way out of the range of my piggy bank.
