One of the best search engine marketing tools online is SpyFu.com. It provides PPC intelligence (who’s bidding what, what the average CPC is for a keyword and more) as well as organic results and competitors for a given URL.
As they describe on their extensive “Learn More” page, there’s a free version and a paid version, with the latter providing far more features than the former.
Overall, depend on SpyFu for PPC statistics, not “natural” SEO rankings. (The organic results are poor. ) You can also count on their system to deliver good competitive information to help you budget your campaign. Take a look, the free version is well worth it! 
