Gab Goldenberg has an interesting post on 101 ways to buy text links.
Understand that I don’t endorse any of these methods. It is your decision as to whether or not to purchase text links. You know how Google treats those links. Of course, what Google doesn’t know wont hurt you. But will you take a chance?
The fact is, link building is link building. You can do it the organic way or buy your links and the effect, from a search engine optimization standpoint, is the same. With one proviso: It is done the right way. But buying text links is fraught with its dangers. That doesn’t mean you shouldn’t do it, however. But it doesn’t mean you should.
Still, if you’re going to buy text links then there is one very important thing to keep in mind. It’s more important than everything else. And I don’t mean the fact that Google frowns upon it. The one thing that you must keep in mind if you are going to buy text links is this: Be discreet. Getting caught could be costly – more costly than the price of your links. It would behoove you to do it with sites you can afford to lose. But above all, don’t broadcast it.