Google don't wan't webmasters to sell links.. look here, Google itself is linking to site selling links ie http://lynx.browser.org/ at http://www.google.com/support/webmasters/bin/answer.py?answer=35769&ctx=sibling And this site http://lynx.browser.org/ is selling links... Google passing link juice to lynx site and they are selling links and ultimately passing the link juice they got from Google.. I wonder how they will deal with a site like this.. Now will they remove the link of http://lynx.browser.org/ from their website? Wow Google..Great going...
Lynx is a browser ( text based browser ) for those who may be visually impared. And I don't think that Google actually sold them a link on that page !!