Shelby Cobra-badged Mustangs are nothing short of treasures to gearheads. That would explain why the cars aren't popping up at auctions like popcorn at a drive-in cinema. But it's a blockbuster when ...

The original-series Shelby Mustang was the top dog in the moniker lineup until Ford took over and released the Boss models in 1969. However, three years before that, Shelby launched a very muscular ...