I was at my Google Webmaster Tools Dashboard
and I see this link: Report paid links
Here is what Google says:
Unfortunately, not all websites have users' best interests at heart. Some site owners attempt to "buy PageRank™" in the form of paid links to their sites. Buying links to improve PageRank violates our quality guidelines.
Here is my question. What about sites like yellowpages.com?
You can pay them for an enhanced listing and they put up at the top.