article_snippet: I never thought it would go up that much,' he said. '
article_snippet: he says that the market has been booming in recent years. '
article_snippet: the market is a combination of the economy coming back,' he said, 'and the fact that interest rates are very low.'
article_snippet: The internet, he said, also has been 'a tremendous, tremendous source of new buyers and sellers of coins that we didn't have 20 years ago.'