First, your piece is a medal not a coin (i.e., money). Medals are not currently as popular with collectors as coins (though they once were) and so your piece has a more limited resale market.
I agree with vb3447, the medal would most often sell for a small premium over silver melt, which likely puts it in the $35 to $45 range. But if you can find a collector who REALLY wants one, $60 to $75 might be possible.
I believe the symbol you are referring to is a Copyright symbol which indicates that the medal's design is copyrighted (likely by Medallic Art Company) and can't be reproduced without their permission.
It's a nice looking medal, one of the better ones to celebrate America's bicentennial (IMHO).
Collecting history, one commemorative coin (or medal) at a time!