Typically, an item that has been ordered, Amazon will deliver to the buyer within the day, but there are several types of products and brands that are not a product of the Amazon, or do not have that item in stock.
Typically, the product is Amazon will ship the order to the buyer within days that it has multiple product types and brands that are not a product of the Amazon or the products are in stock. Therefore, the transport is delayed, postponed several days.
Usually, goods with order Amazon to ship to the buyer within that day. But there are many kinds of goods, and many brands that are not products Amazon or no items are in stock