Pick any condition you choose and decide what you are going to pay for a common, graded or ungraded, and then add three zeroes. Mix gently with a wooden spoon for three minutes and place the set in a secure undisclosed location. The result should be a relatively accurate estimate of your cost for a 518 card set. A sprinkle of O'Hara, Demmitt & Magie as a garnish is not included in this estimate. Wagner, Doyle and Plank will require more zeroes.