12. Opel Kadett
The Opel Kadett was one of the bestselling European compact economy cars ever. It was inexpensive and had decent equipment. Also, it was durable and easy to maintain. For years, it enjoyed enormous popularity, so they exported it worldwide.
Since the Opel was part of GM, during the ‘60s General Motors decided to import the Kadett to America, selling them through the Buick dealership network. At first, Kadetts sold well but soon, the demand was gone, so American buyers turned to Japanese compacts.