Sell your old couch, or buy someone else's. Find a house cleaner, a roommate or a beach house. The free classifieds are grouped by city, category and subcategory (Boston/For Sale/Furniture) and are as easy to post as they are to search. More than just a place to sell things, Craigslist is a true community, a source of gossip, stories and the inspiration for blacktable.com's sparkling "Week in Craig" feature.