Amazon Red Price

On Amazon store there are many prices and I'm trying to get what is referred as Amazon Price that is in red and Large. When I try

$pxml = aws_signed_request("com", array("Operation"=>"ItemLookup","ItemId"=>$itemId,"ResponseG开发者_开发知识库roup"=>"Large"), $public_key, $private_key);
$pxml->Items->Item->Offers->Offer->OfferListing->Price->FormattedPrice;

I get a price that's higher than the red price.

If I use

$pxml->Items->Item->OfferSummary->LowestNewPrice->FormattedPrice;

I get a price lower than the red price that shows up where is say xx new from $5.49 (for example). Does anybody know how to get this value?

Thanks,

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Look for the red price here:

$pxml->Items->Item->Offers->Offer->OfferListing->Price->Amount;

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I found out the answer. The prices weren't matching because the items are sold by 3rd party vendors. When the items are sold by Amazon the above outlined method worked fine. From what I gather you can't get the 3rd party price info through Amazon api.