Report Im not too sure about coins, got a copper backed 2005 quarter in Error and Variety Coin Forums Posted March 28, 2007 Well, local shop guy said its not worth grading like one of you said. I would like to keep it maybe and preserve it, whats the best way to preserve its current condition? Maybe I would sell it, if anyone was interested. I found one in some change a couple of years ago "Rhode Island", It weighed 4.7 which was a good indication that It is a mint error. I decided to pay the dealers fee $80.00 and take a chance on getting it certified. Great Decision PCGS graded it as a uncirculated MS62 Reverse Clad Layer Missing, a mint error.