I have only had one PR8 link pointed to any of my websites but the first thing I noticed when I got it was that I no longer got sandboxed by google, no matter how many links my site gets, it's like the PR8 gave my site authority so google takes me seriously.
all mistaken - dilution yes - pr distribution yes along chain * nofollow link structure with a site to channel pr - not mentioned - inner pages can have higher pr then homepage * yes this is a fact look for example at delimitdesign.com and the article about social media tools this is because inbound links of a certain page have much more effect to add then the trickle down of pr along the structure and if there are other high inbound /authority passing links(total inbound link quality) - link nodes (pages) - along the structure this will also greatly counter dilution and subvert nodes to spread pr in all the directions allowing it to pass etc etc :0 )
Good job on increasing your pagerank by buying links. Google will penalize you as soon as they find out you are buying links.
You don't need to buy the links.... there are many free high PR links for free. See this site for instance: backlinks.theleadsource.net
a pr 8 from a sub page means little if you are trying to get PR - the little googly bot will be sure to visit your page though even if it is no-follow, If you want a do-follow link from a PR9 site go to slashdot org and make a profile, save a bookmark(aka your site), and you have a backlink that will get crawled by the gooly bot within seconds ps:it is a hit or miss when submitting stories, just add a book mark to your profile