Amazon Historical Pricing

AmazonにあたらしいWebサービスができていました

The Amazon Historical Pricing web service gives developers programmatic access to over three years of actual sales data for books, music, videos, and DVDs (as sold by third-party sellers on Amazon.com). Sellers can use Amazon Historical Pricing to make informed decisions on pricing and purchasing.

Amazon Historical Pricing
http://www.amazon.com/gp/browse.html/ref=sc_fe_l_2/102-8127056-1568139?%5Fencoding=UTF8&node=15811391&no=3435361&me=A36L942TSJ2AJA