A theoretical scenario if you will. Say you had a website and wanted to increase its ranking for keyword A. Would it be better to say blast thousands of blog comments, article directory links, social bookmarking links, forum profiles etc. that were of low quality OR Say try to find a handful (maybe 5) say PR 7 links. In theory these high PR links are supposed to be worth thousands of these garbage links, so am I wasting my time building these crappy worthless links? So would I be better off trying to get a handful of these high PR links and be done with it rather than waste my time building tons and tons of these links? Because in theory since these high PR links are supposed to be so powerful, why not just go to some link broker and buy them and save time and effort? Sure they may be expensive to purchase, but it seems like it may even out considering the amount of time/effort/money people waste building thousands of links with software that have subscription fees, VPS fees, proxy fees, captcha fees etc. Curious to your thoughts.