Marino's 1985 Topps All Pro #314 has a 0.8% Gem Rate. / Image Courtesy of PSA With just three Hall of Fame rookie cards, the set has some of the most difficult-to-find cards in Gem Mint condition.

5 Best Football Cards to Invest In If you’re looking to add value to your collection or portfolio, some top football cards often emerge as promising options. Below, you’ll see five cards that ...