Winning bid: $11.3 million This car attracted the highest auction price ever for a California Spyder because it's one of just nine with bodies made of lightweight aluminum alloy instead of steel. "Alloy cars are generally more rare and more prized because they don't survive as well as steel ones," says Gooding & Co.'s Brynan, whose firm auctioned off the vehicle last summer. "They're competition-oriented cars, so they're usually raced or wrecked or things like that." Although the car's long wheel base makes it less valuable than short-wheeled Spyders, the vehicle does have the covered headlamps collectors prize. It also comes with a rare combination of racing equipment, from a high-performance engine to special brakes.