10 Classic Cars that are Plummeting in Value

10. Buick GNX (1987)

Although the golden age of muscle cars came to an end by the 1980s, Buick was able to maintain the concept by replacing big naturally aspirated V8s with a 3.8-liter turbocharged V6. This led the Buick Grand National to be described as one of the fastest cars of its time. It also happened to look like it had been designed by Darth Vader.

With the Grand National heading on its way out in 1987, the Buick was a great way to end its era. A limited number (547) of GNX versions were built. They were all built with engines set to produce 276 hp and 360 lb-ft of torque. The GNX ran the quarter mile — faster than a Ferrari F40 – in 12.7 seconds at 113 mph.

The Buick, once extremely expensive, can now be purchased at a fraction of the cost.