[runevault]

I would have expected more, personally. Craigslist is massive, popular, and been around a long time. That ads up to a TON of listings.

[jzawodn]

~2.2 billion is a ton of listings. What you have to realize is that the craigslist wasn't in hundreds of cities on day #1. In recent years, we've had tens of millions of "live" ads on the site, but it took a bit of time to grow to that size.