The 914 was a design change for Porsche. In fact, it's one of the only Porsches that falls outside the standard Porsche design, which includes the fried egg headlights.
Though it was sold as a Porsche and Volkswagen abroad, Porsche executives did not want to confuse the U.S. market by selling a lower level Porsche as a Volkswagen with the same body style as the Porsche. They felt it might hurt their brand, and they were probably right. Therefore, the 914 was only sold as a Porsche in the United States.
The 914 was sold with either a flat 4 or flat 6 engine. The name of the car often indicates the engine, with 914/4 and 914/6 being the popular nomenclature for these cars.
Though this car won the Motor Trend Import of the Year in 1970, it was not universally liked by critics and it since been held up as the bottom point of the Porsche brand. Still, there are many people who collect these cars and care for them just as much as any other classic Porsche.
You can find listings for the 914 on eBay. There are probably at least 4 or 5 of them listed right now, along with lots of parts.