Around my area Craigslist is the best way. You can always put a sign on it and sit next to the road. Either way, the best way to sell it is clean it up and put a FAIR price on it.
Ditto what knuckey said...take several pictures and post on your local craigslist. Post your phone # and enable the email response (hides your actual email address) so people can get in touch with you.