Buying Content for Blog?

You should consider your traffic first. If you think you are getting more traffic and you are already making money from adsense, then you can use the amount to pay for the content. There are good writer there that are selling their 200-word content at $3

I did intensive keyword research, but don't you think that the articles are not interesting anymore?
In my opinion it will make the articles bad but I know keywordresearch is the most important thing to do and it is a must !!

You can also use PLR content and rewrite them for your blog. PLR stands for Private Label Rights. PLR articles are a relatively new twist on content building. Private label rights are a special type of right or license which you purchase where you are legally allowed to edit and publish the article as your own.
As much as people would like to believe that Panda doesn?t penalize duplicate content, it does. It may not do it outright, but it does, based on its effect. I know that might sound weird but that?s how it all plays out. Remember, the Panda Update was based on an earlier update called the Farmer or Scraper Update. Google got sick of all the scraper websites that would take chunks of content from different sites and re-publish them on these blogs for either back linking or direct traffic purposes. Regardless, Google saw that this trend was filling the Internet with garbage pages. Have a nice day