< Listings like this are becoming increasingly common. Sellers are advertising common coins minted in Philadelphia as rare and uncommon. In many cases, more coins are minted in Philadelphia than in San Francisco or Denver. Most coins minted in Philadelphia do not have mint marks. In order to protect yourself from these scams, NGC and PCGS have amazing resources on their websites that include coin specifications including information on mintage. There are also price guides to help you determine the value of your coins. If you have a question about a coin, please don’t hesitate to bring it in and show us-we’re here to help!