Product Advertising API Returning Prices

I'm using the ProductAdvertisingAPIv1 to get product information and it works but sometimes it does not return the Offers.Listings.Price in the response.

I know some products are Parents but even when I grab the Variations, it still does not return the Offers.Listings.Price

What else do I need to do, other than using the GetItems and GetVariations API calls to find the actual pricing details? It also does not return the CustomerReviews.Count and CustomerReviews.StarRating on any products.