A vintage 55-foot yacht named "Bull" and two smaller boats that once belonged to imprisoned financier Bernard Madoff are headed for the auction block, along with an even bigger yacht once owned by Madoff's right-hand man.

Madoff's 1969 Rybovitch sportfisher, a wooden boat meticulously restored, is the prize offering at Tuesday's private auction. As of Monday, 29 people had put up a $100,000 deposit for the opportunity to bid and more were expected to register, according to the U.S. Marshals Service.

"People have heard of it. It's a piece of history," said Bob Toney, president and CEO of National Liquidators, which is handling the auction for the government.

Also for sale are Madoff's 38-foot Shelter Island runabout, named "Sitting Bull," and a 24-foot Maverick center console named "Little Bull." Then there's Madoff's black 1999 Mercedes-Benz CLK 320 convertible, which has just 12,800 miles on the odometer, and a 61-foot Viking fishing yacht formerly owned by Madoff's ex-chief financial officer, Frank DiPascali.

Together, the vessels and car could fetch several million dollars, but officials don't want to put a price tag on any particular item before the auction. Madoff's notoriety could also boost the final sales prices, said Jennifer Crane of the Marshals' asset forfeiture division.