No. No no no. No no no no no no...! I had a post some time ago about how to tell whether a scholarship is a scam or not. This is one of the top indicators of a scam. Scholarship searches are not something that you pay for. Scholarships themselves are free, and the means to find them are free also.
One common phrase says something like this: "thousands of dollars in unclaimed scholarships -- we can help you find it!" This is a big warning sign. No legitimate place will proclaim that there is money in unclaimed scholarships. Instead, they will just give the name of the scholarship and the info you need to obtain it, whether that be an essay or some special information you have to submit.
If you need to find scholarships, probably the best place to start is at fastweb.com, which is a free financial aid information website that specializes in scholarships and has a terrific scholarship search. Also, don't forget, it's never too early to start searching for scholarships. Remember, many scholarships are only active for parts of the year. Might as well start today! Just don't pay for the scholarships or information about them.