To identify a rare penny, the coin date, peppermint mark and any error or unusual features are required to be examined. Coins such as 1909-S VDB Lincoln St., 1943 Copper Penny, and double dye Penny of 1955 are valuable. See doubling effects, off-center strikes, or missing details. Using a magnifying glass and coin guide can help determine whether any money is rare. Additionally, obtaining coins assessed by experts ensure accurate evaluation for collectors and vendors.