We are here for you with 25 years experience and past coin grader for PCGS, Markham Numismatic is a nationally recognized numismatist in Riverside, CA. It is our unsurpassed knowledge of all rare coins, silver coins, and gold coins that allows us to give you the most cash for your coin collection or your precious gold, coins, diamonds, metals and jewelry. We want to see you come back again as a satisfied customer, and make sure your getting the most value for your jewelry, gold, coins or diamonds. Turn your unwanted gold, coins and jewelry into instant cash with Riverside's largest coin dealer, Markham Numismatic. With decades of experience in getting our clients the most cash for their rare coins, gold, diamonds and unwanted gold jewelry. Markham Numismatic pays the most for rare coins, gold, silver, platinum, diamonds, pocket watches and much more, guaranteed !