Instructions
Check the Yellow Pages under the heading "Coin Dealers and Supplies" for a list of local dealers. Visit their stores and try to learn more about them. Look for an established dealer who has been in business a long time and who is affiliated with the American Numismatic Association (A.N.A.) or the American Numismatic Society (A.N.S.) Alternatively, go to the A.N.A.'s website for a directory of affiliated dealers.
Take the coin to the dealer and make it clear that you are looking for a grading service only. Rule out any suggestion of selling the coin at this stage, because it will only muddy the waters. He may perform the grading service in-house or, in exchange for a small handling fee, pass on the coin to a professional grading body. If you do wish to sell the coin, take it elsewhere once it has been graded. If you are unhappy with your local dealer, either with his qualifications or his choice of grading body, move on to Step 3.
Go online and type "coin grading service" into your search engine. This will bring up a list of specialist grading bodies, as well as other dealers offering a grading service. Look for an affiliation with the A.N.A. or A.N.S., as well as a track record of grading rare coins for high-profile sales. You may find that you can't contact your body of choice directly, in which case you may have to go through a dealer or one of the societies mentioned above. Once the coin has been professionally graded (usually by a team of several experts,) it will be returned sealed in a plastic capsule and with a certificate. Depending on the value of the coin, as of 2010, expect to pay between $15 and $30 for this service.