At the official auction of the FUN Convention by Heritage in early January at the Tampa Convention Center, CAC approved coins brought substantial premiums over coins of same date, type and certified grade sold then or in the near past. Here are ten examples among many that could be listed:1. A CAC MS-66 1942/1 overdate Mercury dime brought $120,000. Two years earlier, the same auction firm sold a 1942/1 overdate with the same MS-66 grade, without a CAC sticker, for $76,375. 2.