What Link Building Can You Do For $30 ?

I saw a couple of other people doing this and like the idea. I am after links to different pages on one of my sites and want to know what you can do for $30. If this works ok then I will do the same for other sites. The important things to me are pagerank on the linking page, when it will be cached by google, link is permanent, dofollow, not spam looking, different IPs. Please let me know what you can do for $30.