Est. Value: $222,000 to $326,000
The Athon, named for an ancient Egyptian sun cult, isn't really a convertible. It has no top whatsoever. As a concept vehicle, driving on rainy days was never really required. It is drivable, though, with a 260-horsepower V8 and a five-speed manual transmission.
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Last updated April 29 2011: 12:57 PM ET