Jay Leno and appraiser Donald Osborne celebrate "Top Down Fun" by assessing three very different convertibles from the Aldrin Museum in Newport, Rhode Island, to determine which one has appreciated the most in percentage terms over the last five years. The Contenders: 1964 Austin Healey 3000 BJ7: A quintessential English sports car representing a highly desired transition model, as the '64 BJ7 was the first with roll-up windows. Donald notes that even as the demographic for this classic matures, the car has maintained its value. 1964 Cadillac Deville Convertible: An icon of mid-century American luxury. This model was technologically advanced for its time, available with the first automatic climate control and cruise control in an American car. Its value has held steady, continuing to appeal to a new, diverse audience. 2002 Chevrolet Camaro SS 35th Anniversary: This limited-edition performance car celebrates the Camaro model. It boasts a six-speed manual gearbox, which was a no-cost