It's really funny you should put it that way. The only guy I personally know that has a VW Beetle is my friend that works at a video game company, is into comics, sci-fi and dungeons and dragons, and keeps a Conan sword in the bud vase.
There's also
this nerdy webcomic guy that has one.
BTW, Auto Trader didn't work very well when my sister tried to sell her Miata a while ago. Hardly any hits. What really worked for her was the San Diego Union Tribune classifieds. Holy crap, the phone rang off the hook.
Try your local classifieds!