I was looking for marriage records for my parents. I don't know when or where they were married, bu I have all of their vital information. I found my mother on PeopleSmart.com and they listed marriage records as available.
They advertised that they had the information I was looking for and that it'd be $7.95 to access it. So I paid, careful to avoid the "Free trial" scam that so many credit check places use. (Free for a week, $35/year thereafter, unless you cancel withing the week. Cancelling is usually difficult).
They sent me the "Report" which was just the public vital information I saw before! The "Marriage Records" were just search results for other people with my mothers name that were NOT my mother! The records they advertised they had were not what I needed or paid for.
Unfortunately, every similar site uses a paywall and prevents you from knowing that you are getting the right information. Use with caution and read the Terms And Conditions!