Let's say you had some free time, a set of snips and your copy of the 1942 classic 'How To Do Aircraft Sheet Metal Work' from lindsaybks.com (15USD) had just arrived. Maybe you have a project in mind.
A Douglas DC-3 may be too ambitious for a first project
A Bugatti 57 a little too intricate.
Although you can buy a replica from Chaparralcars.com A 2-E seems simple enough.
http://www.chaparralcars.com/index.php