First appearance appearance issues to remain. Furthermore, even fewer of those remaining copies will be in the pristine condition prized by collectors. What few remain can be worth thousands of dollars to interested collectors. For example, in 2004, a copy of "Flash Comics" #1 (January 1940), the first appearance of The Flash, was auctioned for $42,000 and a copy of "Captain America Comics" #1 (March 1941), the first appearance of Captain America sold for $64,400. In 2010, another copy of "Flash Comics" #1 sold privately for $450,000. The first appearance of Superman, "Action Comics" #1 (June 1938), has been regarded as the
Cultural impact of the Guitar Hero series the "Guitar Hero" franchise have exceeded one billion dollars with over 16 million units sold, excluding downloadable content. Over 20 million songs have been sold as downloadable content as of July 2008, and 34 million by May 2009. As of October 9, 2008, the series has sold 23 million units with sales of US$1.6 billion, and as of May 2009 has earned US$2 billion at retail. Activision claims that "Guitar Hero" is the third largest video game franchise after the "Mario" and "Madden NFL" series, and is present in over 15 million households. "Guitar Hero: World Tour" along with other