[Airco]

I just read that other post about pr5 text-links that sell for a tenner.
I have one site with pr4. I assume that if your
site is pr1 a link from a site with pr5 will do more for you than if your site is pr4. Is that correct?
Is there some kind of table or formula that shows how links from other sites with a certain pagerank will affect your own ranking or is it all just a big mystery?
Also will links from a site with lower pagerank affect your own PR negatively or not? I'm reading all kinds of different things on that subject. What's true and what's not?
Thanks!