php - 使用亚马逊 API 获取所有商家针对特定产品的所有优惠

Question

我需要能够使用亚马逊 API 获取产品的所有报价列表。这是我发送的请求：

http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&Operation=ItemLookup&SubscriptionId=&AssociateTag=&Version=2011-08-01&ItemId=B007IJQDQQ&IdType=ASIN&ResponseGroup=Offers&Condition=All&MerchantId=All

这将返回以下优惠：

<Offers>
<TotalOffers>1</TotalOffers>
<TotalOfferPages>1</TotalOfferPages>
<MoreOffersUrl>
http://www.amazon.com/gp/offer-listing/B007IJQDQQ%3FSubscriptionId%3DAKIAJTZ6VROOTPJAPPWQ%26tag%3Damazoautom-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D386001%26creativeASIN%3DB007IJQDQQ
</MoreOffersUrl>
<Offer>
<OfferAttributes>
<Condition>New</Condition>
</OfferAttributes>
<OfferListing>
<OfferListingId>
TR5sygI0VR7cwy3Hg0DBHwgCWFnkqXLyCR70jjMhy1h8gWlEisKYt5cqDbS2Fu1SEqDtfBILdxYDziJdFzfsqMpPJkBqcYV3DFovHx1nXWRy9wHS6CFZXknBvsCo1bxYS%2BsxAeYrZHrS6g6aakEJQA%3D%3D
</OfferListingId>
<Price>
<Amount>375</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$3.75</FormattedPrice>
</Price>
<AmountSaved>
<PercentageSaved>56</PercentageSaved>
<Availability>Usually ships in 1-2 business days</Availability>
<AvailabilityAttributes>
<IsEligibleForSuperSaverShipping>0</IsEligibleForSuperSaverShipping>
</OfferListing>
</Offer>
</Offers>

如您所见，即使它说有 3 个新报价，它也只返回 1 个报价。有谁知道获得所有报价而不仅仅是最低报价的方法？Merchant ID='ALL' 不会这样做，其他任何响应组（如 offerFull、offerSummary 或 offer）也不会这样做。

任何帮助将不胜感激