On Amazon.de you can sort the search results by: Best result | popularity | cost: ascending | user rating | date On Amazon.com this feature is missing! Why?

On Amazon.de you can sort the search results by: Best result | popularity | cost: ascending | user rating | date On Amazon.com this feature is missing! Why? Btw. the technology: A9.com is a subsidiary of Amazon.com based in Palo Alto, California that develops search and advertising technology: is http://en.wikipedia.org/wiki/A9.com http://en.wikipedia.org/wiki/A9.com