Though it had a rather long production run, only 374 Phantom VI's were ever made. That works out to an average of less than 20 per year.
The first engine sold with the Phantom VI was the 6.2 liter V8. After 1981 that was boosted up to 6.75 liters. The original transmission was a 4 speed automatic, but after 1979 the 3 speed became the standard.
The Phantom VI has the distinction of being the last passenger car with a separate chassis. The Mulliner Park Ward was the most popular choice for the body, but a convertible-like Landaulettes were also made during those 23 years of production.
Though the concept and technology were very much vintage, this car was still a hit with those who could afford it and had the connections to buy it.
There isn't much chance that you'll be able to find one of these cars in your local used car lot. You might see one pop up in a charity auction on eBay every few years, so just keep your eyes peeled if you want a chance to buy one of these very exclusive and allusive luxury cars.