Let's just say that I have access to a few PR5 / PR6 / PR7 links (about 25 - 30 of each) What would be the potential value to my site in obtaining backlinks from these pages if the content is relevant to what I have on my site? What would be the potential value to my site in obtaining backlinks from these pages if the content is not relevant to what I have on my site? Hypothetically speaking of course.
the value of them being relevant to your site is that you gain PR and you get traffic coming from those sites of course... if the content is not relevant then I dont see much benefit at all...