Has anyone ever purchased a high PR domain site for the purposes of content development & link building? Are there any risks (i.e. could the domain's PR drop off when the domain is transferred - either immediately or within X months after a Google PageRank refresh)? Has anyone successfully used this tactic? I'd appreciate your feedback, thanks.
Theres always a risk PR will change. Your only buying the PR at the time of the sale. So always a big risk.
I have not experimented with buying but I have read somewhere on Google that if the content does not change the page rank will be preserved after a change of DNS or IP. I once found a long dropped domain with big PR back link. I put the archive.org saved page for it and it was pr 4 for a while. Never really did anything with it and PR dropped down to 2 I think. If you slowly change the content and keep it on the same subject it should be okay.
If you can buy the domain and leave the existing content in place for some time, the site's PR will likely not change excepted for the natural changes to its PR that would happen if the old owner stopped building links. I mean, if the existing site achieved their current PR by using unnatural link building techniques like blog commenting, forum sigs, article submission, directory submissions, etc. then they're PR will likely drop anyway if they don't continue to build links. The effectiveness of these types of link building techniques fade over time as the links roll of the home pages of blogs, roll off the recent posts pages of forums, roll off the recently submitted articles in a cateory page, etc. and the link falls deeper and deeper into the archives. They lose "juice" over time because they become less and less linked from internal pages on the site where the link lives. Get the site, leave its content in place, and add links to your main site over time (assuming the content is relevant). Then a year or so from now you might consider redirecting the pages. You definitely want to redirect the pages one-by-one assuming you have pages about similar topics on your main domain.