VERO BEACH, Fla. -- Richard and Amanda Peacock spent five years building their dream home, a 10,000-square-foot, orange mansion overlooking the ocean here. They filled it with leopard-skin chairs, pinball machines, antique Coca-Cola signs and six sports cars. It had a room full of 100 hunting trophies -- including a hyena and the head of an elephant -- and an aviary out back housing eight rare parrots.

On a recent Saturday, they held a one-day auction to try to sell it all.

"Four...