What NON-Mopar car do you most regret selling?

I would want my first car I tagged ( I owned and sold 4 car before I was 16) 1978 Mustang II Cobra. Only because of the sentimental value. I can say that I regretted selling a 1955 Packard Clipper. Such a cool car and it still sits where I unloaded it almost 12 years ago.