Earlier quoted context omitted.
Can you explain why you're creating a craigslist competitor? I'm having a hard time understanding why so many people are doing this. What problem are you solving?
I got my first two apartments on Craigslist, both a few years ago. I was looking for a new one this year on Craigslist, but the rentals section is so full of lies and "call me for info" that it's worthless. Basically, the openness of Craigslist is destroying it. I'm not sure how to solve the problem, but I would really like a forum that is non-commercial.
craigslist's problems are not so glaringly functional. They have safety problems with anonymous posters and scamers. They have issues with locking out people in the development community. I've heard a lot of complains about their forums.
It's hard to figure out the best way to attack though problems in a way that draws people from craigslist to a new service.