Re: Richard Wilson antique flintlock pistol 1730's
British pistols of that era are not lying around on the street, but they are not exceedingly rare, either. IMHO, trying to restore it would amount to a career, and would cost more in time, effort and parts than the pistol would be worth in the end. Now, if it could be traced to George W. (the original, not Bush), it would be a different story, but that is my two cents worth right now.
There are restorers of that type of gun, and a Google search might find some. Then, you could send pictures and get an estimate. Contacting some appraisers, plus checking auctions, should get you an idea of the current value. But be warned that professional appraisers get paid no matter what their valuation is, so you may have to shell out money up front. (I work for nothing, and that is what my appraisal is worth!)