Est. value: Around $31,000
In Buick ads of the day, the Sedanette was touted as a roomy four door with a stylish coupe look, an idea which echoes in some of today's most popular cars. (Think Hyundai Sonata.) The Sedanette is starting to catch collectors' eyes, the industry watchers at Hagerty Insurance say.
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Last updated February 07 2011: 6:23 PM ET