You won't make any friends at craigslist (in fact, they'll probably block you), however you could try "importing" craigslist ads (of course, credit and link pro

You won't make any friends at craigslist (in fact, they'll probably block you), however you could try "importing" craigslist ads (of course, credit and link properly). I don't know if I'd suggest it, but it's a route you could consider. The founder of Lyrics Wiki ( http://lyrics.wikia.com/ http://lyrics.wikia.com/ ) indexed other lyrics sites, and eventually was bought by Wikia. Also, look at a few of the paid craigslist alternatives- they might be willing to give you listings if you send traffic their way. I asked this same question to Jimmy Whales a few months ago. Wikipedia started as a paid service, where professionals were paid for their work. It never got big, so they changed their business model. For them, the already-made articles were enough of a jumping point. Side note: craigslist already has many, many more-featured competitors. Do you have a theory as to why craigslist is still the most popular software? Make sure you do before you bother creating a craigslist competitor.