If you are using Google Webmaster Tools then you would notice at your dashboard there is a new tool, “Report Paid Links” It seems that Google is really against paid links. It is stated there that buying links to improve PageRank violates Google quality guideline.
Well, as an advertiser, there is always other ways to get high search engine ranking besides buying links from websites and blogs. They can always find other options offered by search engine optimization company like Customer Magnetism. Whether you want SEO or search engine marketing, they will be sure that your websites generating top positions within the big three - Google, Yahoo & MSN.