#10 Uclue

Uclue is a fee-based research service staffed by former Google Answers Researchers (GARs).  Google Answers was an online knowledge market offered by Google that allowed users to post bounties for well researched answers to their queries and was shut down in 2006.

Uclue's researchers can provide answers spanning a broad and eclectic array of topics. Categories include Business, Genealogy, all the Sciences, Technology, Computer/Software Help, Health, and the Arts.

The fee range is $10 to $400, and you can select the fee based on the complexity and/or obscurity of the requested information and pay it via Uclue via PayPal while posting a question. If the question isn't answered within 14 days, the fee will be refunded. Customers also have 30 days to request a refund if dissatisfied with an answer; however, customers are encouraged to use the Clarification process to refine the answer to their satisfaction before seeking a refund.

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