OK, let's say I buy a blog post on a decent PR4 blog (not a spammy blog with tons of links, just a good-looking personal blog of a webmaster), I write a unique article and will include a link with my desired anchor text in it. This way I should get some nice link/PR love. However, I wonder if my link won't get weaker when my post is no longer on the first page of that blog? - I mean after some time you will be able to find my post in the blog's archives only. So this can even decrease my site's SERP when my blog post goes down from the first page, right?
It won't necessarily lower you in SERPs, but you're not going to be getting as much as bang for your buck with link juice. If the home page is PR4 and it links to your site, you get a share of that PR4. But if your content is on a sub-page of the blog, chances are the PR is lower, so you're not getting as much link power from it. BUT, there may be less links on that page, so maybe you get an undiluted amount which equals as much as what you got on the home page. All these factors can contribute to your pagerank, but moving your link from the home page to a subpage probably won't effect where you in appear in the SERPs. After all pagerank has nothing to do with true SEO ranking in SERPs. Who cares what your pagerank is if you appear first in the SERPs for your target keyword?
exactly backlink building works if you get genuine backlinks they unordered manner in which backlinks come is loved the most by SEs
Well, it IS for linkbuilding, but not exactly PR... Getting a link/article on the first page will give you some traffic while it is on top, and even deeper once it gets into the archives, though the deeper the gets the less overall power it holds. It does count as a backlink though, and with luck, it'll be on an IP where your other IPs are not on. It possibly could help in PR if the article is good and people link to it (you can help it along by socially bookmarking the individual article) It will bring in some traffic while it's at the top, as well as some additional traffic assuming the post makes it into SERP itself. If it is a high quality blog and most of the other articles on it are related to your niche, then yes, it can and will help in many ways. Though, if the quality is low or the subject matter is unrelated it's help will be significantly less...
Personally, I wouldn't worry so much about losing PR over time..if you have a genuine massive link building campaign, you will have links that over time will also GAIN in PR...so instead of trying to get a few well-placed links - get many links, some well placed, some not so well-placed - but of course one big key is your anchor text - make sure it is optimized for your keyword and webpage for which you are seeking to rank. Sean
If you really want to buy good links for pr than i will say blogroll or buy a link in older post which is already having some good page rank . Because the link you will buy today will be disappears from first page if the content keeps updating .Smart guys buy links on old post those are having good pr already .
Typically, I will throw a few extra links at the post to make sure it gains some PR, It will then be of greater benefit to you. Actually I do this with most pages I find a link to my site on. Add it to stumble upon etc.
Thanks guys for your replies! Of course I don't care about PR, nor the traffic from that blog post. The only thing I care about is the SERP of my site, so I need many strong links. And strong links must be from related sites and have some PR. I'm just afraid of that while my link is on the first page of the blog and the blog is PR4 = I get a PR4 link. However, later when it goes to the archives, it can be PR2 or PR1 only and this could decrease the SERP of my site, as the link would become weaker.
You can check some of the archived pages that already exist to see what their PR is. This will give you an idea of what will happen to your post later.