 Those examples that still exist today, do so in very limited numbers.For some reason, their values have not risen nearly as high as the Mopar "aero cars", in spite of their rarity and their great track successes during the pinnacle of stock car racing (the aero wars years).Some experts have assumed that this was due to the sheer outrageousness of the Dodge Charger Daytona and the Plymouth Superbird, with their huge rear wings; as the MOPAR winged cars' prices have eclipsed the far more subtle bodywork of the Mercury Cyclone Spoiler II.