From Wiki:
A wagon (estate) called the Ferrari 456 GT Venice was also built. Only a small handful were made by Pininfarina. Prince Jefri Bolkiah of Brunei ordered seven to be built. After Pininfarina designed and built them, the prince only purchased six. Each wagon is rumored to have cost the Sultan around 1.5 million U.S. dollars.
ps: the picture on Wikipedia of this car is actually this very same picture