Alan_Mater - 2:57 am on Jul 14, 2010 (gmt 0)

There is a lot of risk involved when you are considering buying links although I would say they could be undetectable by Google if it is a "good paid link". These are painstakingly done to avoid detection like deals done via emails or personal meetings and is not obvious that can be detected by Google's algorithm. That's why Google has a better way of detecting them -by getting people to report such paid links activities. Still, you may have to weigh such risks before you decide.