4. Shelby GT 350 R – $3.85 million
Carroll Shelby built only 36 fire-breathing pure racing Mustangs for the 1965 model year. Each of those examples had numerous wins under its belt, and every R model is considered to be an extremely valuable piece of Mustang and racing history (via Motor Trend).
They rarely come for sale, but they achieve astronomical prices when they do. That was the case in 2012 when a highly original GT350 R was sold for almost $4 million. With only 4900 miles on the clock, this car, with its original transmission and engine, and all-important parts, was well-known and famous amongst the Mustang aficionados.