The more successful your company, the faster your sales and profits grow . . . and the faster you go out of business?

Historic Newspaper Archives Inc., of Rahway, N.J., may eventually suffer from that paradox. It bought more than a million American newspapers from libraries that were replacing them with microfilm. The papers, dating from 1880 to 1974, sell for $29.50 each, mostly as birthday gifts. Historic dates, such as D-Day or the moon landing, cost extra. Business is good, but it might not last long, because the supply of yellowing papers from the New Deal and other times of intense historical interest is limited. "Every day we are looking for newspapers," says Historic Newspaper Archives's Christophe Miller. Unless he uncovers some remarkable caches of old papers, a string of great years could force the company out of business.