The first Silver Shadow rolled off the line with a retail price of $19,700. Remember that this was 1965, when a brand new Ford Mustang might cost just a few thousand dollars.
There were two generations of the Silver Shadow. The original was sold from 1965 until 1976, with the Silver Shadow II sold from 1977 to 1980.
The original Silver Shadow had a V8 engine making 172 horsepower, which seems a bit underpowered by modern standards for a car of its weight. The Silver Shadow II got a slight upgrade to 189 horsepower, thanks in part to a GM Turbo Hydramatic 400 tranny.
Starting in 1977, the longer wheelbase model of the Silver Shadow was renamed the Silver Wraith. It was still the same car as the long wheelbase Silver Shadow from previous years.
The Bentley version of this car was called the Bentley T, and it was almost the same car except for the obvious badge differences.
The Rolls Royce Silver Shadow was sold in relatively high numbers for a long period of time, so they are still the most common Rolls Royce you can find out there today. There were several of them listed on eBay when I checked recently, and I'm sure there are probably at least a couple listed right now. It's also the cheapest way to get yourself into your very own Rolls Royce.