Here is a nice list of some of the best classified sites out there:
Craigslist: Local Classifieds and Forums
The most popular classifieds site available - the best place to get visibility.
Pros:- Lots of buyers, sellers, and pageviews
- No need to create an account
Cons:- Lots of spam
- Very basic listings, not many available options
Backpage: Free Clasisifieds, Jobs, Employment, Appartments, and Rentals
Backpage is very...