We've always known our classic cars are special and valuable, but it's interesting to see just how valuable some of them have become in recent years. Auctions of especially rare or noteworthy vehicles have run far into the six-figure range, and some have even broken the million-dollar mark. This 1971 Plymouth 'Cuda convertible, equipped with a 440 Six-Pack engine and 4-speed transmission, recently sold for a whopping $800,000 at a Hemmings collector car auction. On top of its beautiful condition, this car has a pretty cool story behind it.