(http://www.4gamer.net/news.php?url=/news/history/2007.07/20070709142221detail.html)

(http://gilcrows.blog17.fc2.com/blog-entry-1394.html)

(http://www.ps3-fan.net/2007/07/4_14.html)

(http://gigazine.net/index.php?/news/comments/20070705_amazon_bargain/)