I also thought that most Craigslist users find other peoples ads through browsing the categories.
HOWEVER, I recently found out that...
Users rarely if ever find your ads browsing through the categories. Users use Craigslist just like they use Google - they type search queries in the Craigslist search engine.
So boy, was I dead wrong!
So this is why I was posting tons of ads on Craigslist everyday and never getting any calls.
You have to use the keywords!
The question is... How do you systematically find out which keywords to use in your titles and description?