Classified Websites for SEO?

Hey Guys,

I could read on some websites that free classified websites can help to improve our serp positions. But i think such sites offer nofollow links. Then how this be possible? Do you have any idea/experience on this? Please feel free to share your experience.


Don’t the people at “SEO Services” in your signature link know?

for traffic may be, not much for seo.
classified ads expire after x days.