I second the motion on the Mitsubishi. 30 years later not only is the technology further developed, it's a fully finished car. Waterproof, etc. I couldn't guess if the Doran will be a part of history or not, collectability is up in the air. That blue/green one used to be in a museum or some collection, (Don't 'zacktly remember) it seems to have bounced around since it went back into circulation. It was for sale in Chicago more than 2 years ago for $7,500.
http://motorcycles.smartcarguide.com/listing/49793621/
Maybe there's a third Doran. http://www.evalbum.com/243