Amazon Product Advertising API Developer's Manual page 327

Product Advertising API Developer Guide
SearchIndex: Automotive
Value
relevancerank
salesrank
price
-price
reviewrank
-launchdate
SearchIndex: Baby
Value
relevancerank
salesrank
price
-price
reviewrank
SearchIndex: Beauty
Value
relevancerank
salesrank
price
-price
Sort Values for CN
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Best to worse selling
Price: Low to high
Price: High to low
Average customer review: High to low
Latest arrivals
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Best to worse selling
Price: Low to high
Price: High to low
Average customer review: High to low
Description
Items ranked according to the following criteria: how often the keyword
appears in the description, where the keyword appears (for example,
the ranking is higher when keywords are found in titles), how closely
they occur in descriptions (if there are multiple keywords), and how
often customers purchased the products they found using the
keyword.
Best to worse selling
Price: Low to high
Price: High to low
API Version 2011-08-01
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