The first generation C-body Gran Fury was sold as a 2 door coupe, 4 door sedan, and 4 door station wagon. It was a full size car that was similar to the Chrysler Newport and Dodge Monaco.
The second generation 1980 - 1981 Gran Fury was only sold as a 4 door sedan. The engine options were a slant 6 I6 and a couple of V8's.
The third generation Gran Fury was sold as a 4 door sedan and had similar engine options as the second generation models. The design was a bit more boxier, which helped it fit in with the 1980's a little more. These cars were sold from 1982 to 1989.
About 15,000 Gran Furys were sold each year of production throughout the 1980's. That number was usually a few thousand less than the similar Dodge Diplomat, and the Chrysler Fifth Avenue outsold them both despite costing an astounding $6,000 more. They were all pretty close to the same car, so it would have been smarter just to buy a Gran Fury and spend $6,000 on options and customizations. Everything in the Fifth Avenue could have been bought for that price and you'd still have a lot more money left over.
These cars are still out there on the used car market, but there is not a huge interest in their styling. If you are looking to buy a used Gran Fury, my only advice would be to check out eBay first. They are usually much less than any car price guide is going to tell you and lower than you'll find on your local used car market.