I have a pr3 main page and a blog www.mydomain.com/blog inside that is a pr2. Its an established site blog is 2 years old. I am about page 10 for many of my keywords. How helpful would a pr 7 or pr 6 link be in helping me. They are kind of spendy but if they are worth it I will invest.
Just build links for free..... there are many ways to build links for free..... depending on your niche (if it's super competitive, good luck!) but if it's not, just build links and you will rise up higher. be building links to your inner pages and your blog pages....
pr 6 or 7 site will help a lot but you should always be looking to add backlinks from as many different sources as you can find and make sure to use your keyword you are targeting are used as hyperlinks on the pages you are getting links from. Scot
If it's related it will help. However, if your term isn't that competitive you should be able to get there without purchasing links.