The OfferSummary response group provides the number of offer listings and the lowest price for each of the offer listing condition classes, including New, Used, Collectible, and Refurbished.
The OfferSummary response is based on the item ID and is not affected by changing the MerchantId parameter or any other parameter that changes the number of offers returned in the Offers or OfferFull response groups.
Sample Response (REST)
<?xml version="1.0" encoding="UTF-8"?>
<ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2006-03-08">
<OperationRequest>
<HTTPHeaders>
<Header Name="UserAgent" Value="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"/>
</HTTPHeaders>
<RequestId>0EWQ0RD6NQYMNCB1SQE2</RequestId>
<Arguments>
<Argument Name="MerchantId" Value="All"/>
<Argument Name="Service" Value="AWSECommerceService"/>
<Argument Name="AssociateTag" Value="[Your Associate ID Here]"/>
<Argument Name="AWSAccessKeyId" Value="[Your Access Key ID Here]"/>
<Argument Name="ItemId" Value="0439358078"/>
<Argument Name="ResponseGroup" Value="OfferSummary"/>
<Argument Name="Operation" Value="ItemLookup"/>
</Arguments>
</OperationRequest>
<Items>
<Request>
<IsValid>True</IsValid>
</Request>
<Item>
<ASIN>0439358078</ASIN>
<OfferSummary>
<LowestNewPrice>
<Amount>514</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$5.14</FormattedPrice>
</LowestNewPrice>
<LowestUsedPrice>
<Amount>525</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$5.25</FormattedPrice>
</LowestUsedPrice>
<LowestCollectiblePrice>
<Amount>957</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$9.57</FormattedPrice>
</LowestCollectiblePrice>
<TotalNew>48</TotalNew>
<TotalUsed>46</TotalUsed>
<TotalCollectible>7</TotalCollectible>
<TotalRefurbished>0</TotalRefurbished>
</OfferSummary>
</Item>
</Items>
</ItemLookupResponse>
The Request that Generated the Response (REST)
http://webservices.amazon.com/onca/xml?Service=AWSECommerceService
&AWSAccessKeyId=[Your Access Key ID Here]
&AssociateTag=[Your Associate ID Here]
&Operation=ItemLookup
&IdType=ASIN
&ItemId=0439358078
&MerchantId=All
&ResponseGroup=OfferSummary