Just stumbled across his rather tasty garage in Oyster Bay, Long Island NY:
http://www.billyjoel.com/news/20th-c...ors-oyster-bay
Quite an eclectic collection - and they're all licensed and on Battery Tenders and ridden by someone apparently. Probably 'the Man'. These were the only 2 Ducatis I saw, but lots of Guzzis, Triumphs and a tasty Vincent.
Pretty friendly mechanics/helpers in there.
It would make a nice destination for anyone in the New York area.
Free, and open to the public Tuesday evenings 6-8PM and Sat/Sun 10-4PM.