What are the most expensive Cadillac convertibles?

"The Cadillac Ciel is the most expensive convertible that Cadillac has. It just came out and is pretty new, it's about 80,000 dollars for a basic model."

The Ciel is a prototype and NOT for sale. The most expensive Cadillac model (for the era it was manufactured) was the 1958 Eldorado. In 1958 it was the highest priced automobile model in the world.