If You Want a Car That's Sure to Stand Out, Get One of These

3. The Mazda RX-500

Produced in: 1970 Cost Estimate: Not revealed Another window into the past was the Mazda RX-500 concept automobile from 1970. This two-door coupe with swiveling butterfly doors was a mid-engine vehicle. The original RX-500 was a concept vehicle meant to encourage driving safety. It included features like back lights that changed color to indicate different information rather than just turning on when the vehicle was braking.

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Twitter.com / Manuel612035513 / Mazda RX500 The car's lights changed to green while it was speeding and to amber when it was cruising. The RX-500's usage of plastic during production also contributed to its low weight of 1,873 pounds. With 247 horsepower, the car could reach a top speed of 150 miles per hour.

4. Zero Dome

Produced in: 1978 or 1979 Cost Estimate: $30–60,000 Many believed that when the Dome Zero went into prototype production in the late 1970s, it would hit the market and cause a major stir. Ultimately, its low-key, boxy style was perfect for the 1980s. You could practically picture Marty McFly getting behind the wheel.

Facebook.com/TFPrototype/Dome Zero Unfortunately for enthusiasts, the car just vanished from sight. Some argue that Dome Zero's demise was solely due to financial issues, while others attribute it to the car's failure to meet safety regulations in Japan. Being a small business in the late 1970s, Dome lacked the resources that larger industry titans like General Motors did to see a project like this through to completion.