Amazon api not showing price when using ASIN

Question

I need to get the top selling books along with it's details from amazon jp.

As of now, I can get the top selling books but it only gives ASIN and TITLE for each item.

<TopSeller>
<ASIN>4047318752</ASIN>
<Title>艦これ白書 -艦隊これくしょん オフィシャルブック-</Title>
</TopSeller>

So I need to get the item's details separately. I can get the details now but there is no PRICE even if I include OFFERS and it's variations.

This is the uri I use:

http://webservices.amazon.co.jp/onca/xml?" .
                "Service=AWSECommerceService" .
                "&Operation=ItemLookup" .
                "&BrowseNodeId=465610" .
                "&MerchantId=Amazon" .
                "&Condition=All" .
                "&IdType=ASIN" .
                "&Availability=Available" .
                "&Version=2011-08-01" .
                "&AssociateTag=$this->associateTag" .
                "&BrowseNode=17".
                "&ItemId=$itemIds" .
                "&ResponseGroup=OfferFull";

This is working, it's just that the price is not getting listed, and I just omitted the other ResponseGroup.

If you have another idea of getting the top selling books with details and price. I'd be more than happy to see it.

As Requested by CyberMJ:

Request:

"http://webservices.amazon.co.jp/onca/xml?" .
            "Service=AWSECommerceService" .
            "&Operation=ItemLookup" .
            "&BrowseNodeId=465610" .
            "&MerchantId=Amazon" .
            "&Condition=All" .
            "&IdType=ASIN" .
            "&Availability=Available" .
            "&Version=2011-08-01" .
            "&AssociateTag=$this->associateTag" .
            "&BrowseNode=17".
            "&ItemId=$itemIds" .
            "&ResponseGroup=Variations";

Response:

    <ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2011-08-01">
<OperationRequest>
<HTTPHeaders>
<Header Name="UserAgent" Value="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.65 Safari/537.36"/>
</HTTPHeaders>
<RequestId>b66dda52-62bf-495e-abd5-f2f9a8d96eeb</RequestId>
<Arguments>
<Argument Name="Condition" Value="All"/>
<Argument Name="Operation" Value="ItemLookup"/>
<Argument Name="Service" Value="AWSECommerceService"/>
<Argument Name="AssociateTag" Value="mediabooks0db-20"/>
<Argument Name="BrowseNode" Value="17"/>
<Argument Name="Version" Value="2011-08-01"/>
<Argument Name="Signature" Value="/tC4kFaeaxsvL11YLthHe09PHKUQVAxTTZrf6D8FXiw="/>
<Argument Name="Availability" Value="Available"/>
<Argument Name="MerchantId" Value="Amazon"/>
<Argument Name="ItemId" Value="B00DYKPPGM,4047318752,4103345918,4047292664,B00DYKPPGM,4758007837"/>
<Argument Name="BrowseNodeId" Value="465610"/>
<Argument Name="IdType" Value="ASIN"/>
<Argument Name="AWSAccessKeyId" Value="AKIAIGEZH2RG5QKAUQ5Q"/>
<Argument Name="Timestamp" Value="2013-09-19T12:04:18Z"/>
<Argument Name="ResponseGroup" Value="Variations"/>
</Arguments>
<RequestProcessingTime>0.0160898510000000</RequestProcessingTime>
</OperationRequest>
<Items>
<Request>
<IsValid>True</IsValid>
<ItemLookupRequest>
<Condition>All</Condition>
<IdType>ASIN</IdType>
<MerchantId>Deprecated</MerchantId>
<ItemId>B00DYKPPGM</ItemId>
<ItemId>4047318752</ItemId>
<ItemId>4103345918</ItemId>
<ItemId>4047292664</ItemId>
<ItemId>B00DYKPPGM</ItemId>
<ItemId>4758007837</ItemId>
<ResponseGroup>Variations</ResponseGroup>
<VariationPage>All</VariationPage>
</ItemLookupRequest>
</Request>
<Item>
<ASIN>B00DYKPPGM</ASIN>
</Item>
<Item>
<ASIN>4047318752</ASIN>
</Item>
<Item>
<ASIN>4103345918</ASIN>
</Item>
<Item>
<ASIN>4047292664</ASIN>
</Item>
<Item>
<ASIN>4758007837</ASIN>
</Item>
</Items>
</ItemLookupResponse>

Answer 1

I think I figured it out, try changing your response group to

responseGroup('Large,VariationSummary')

And then get the price via

$response->Items->Item->VariationSummary->LowestPrice->Amount

Adding VariationSummary allowed me to get prices on the few items that were missing them