It’s worth noting that every keyword has a minimum bid that is unique to how successfully that word has been used in an advertiser’s particular account. So the minimum bid for the keyword ‘Kansas City BBQ sauce’ will be different in your account than in your next door neighbor’s account, who happens to be using the same keyword.

Depending on the specifics of how Google calculates the “Inside AdWords: A common AdWords misconception explained… [via: SearchBlog ]