1968 Barracuda Formula S Convertible Existing?

Higher that the survival rates of the Fastback and coupes.

the more unique and expensive the car typically, the higher survival.

wing cars have very high survival rates. They were always special and many thought collectible from start. Many have low miles.

Charger 500’s have much lower survival rates cause they are not as unique as a wing car. The 2nd, 3rd, 4th owner in the 70’s treated them like any other Charger R/T. Maybe even lesser since no R/T badging. Just a stripe that fades away or get repainted over.

corvettes have high survival too. In the rust belt, many treat them as summer cars. Same with convertibles. They are slow to warm the interior on a cold below freezing winter day.