This 1999 Porsche 911 Carrera cabriolet is finished in silver over black leather and is powered by a 3.4-liter flat-six linked to a six-speed manual transaxle. Other features include a body-color hardtop, a black power-operated convertible top, cruise control, heated seats, a Becker CR-220 stereo with a six-disc CD changer, 18″ alloy wheels, and carbon-fiber accents on the shifter and parking brake handle. The car was first registered in Pennsylvania, has resided in California since 2000, and…