We are searching in the Indian Locale.
Required Search Parameters are as follows:
"Availability" => "Available",
"ResponseGroup" => "Medium,Offers"
We figured out that A product having parent ASIN will not show a price because it is just a container for the child ASINs. So we can add "Variations" in the response group to get the prices of the child ASIN. This worked only for Apparels.