I just found a new domain name which I though a good name. In fact, its so good that I can’t believe that it was still available. But before buying a domain name, one should find out the history of the domain. You don’t want domain which has been used for spamming, and thus penalized by search engine.
One tool you can use is http://www.archive.org/web/web.php. But there is a possibility that it was previously owned by somebody.