For years, musicians have celebrated the romance of the open road and the cars that accompany them in song. Naturally, nostalgic collectors crave these iconic vehicles. In a recent episode of CNBC’s “Jay Leno’s Garage,” auto appraiser and opera singer Donald Osborne joined Jay Leno to examine three cars that once inspired musical hits. The duo assessed which car has appreciated the most, adding a touch of humor and melody to the world of automotive investment.