Cameras are not sold like oranges, you don't buy a case and hope they don't go rotten.
There is a system which, without going into detail, is based on an ever decreasing price from the first day pre-orders are taken -- to the end of its cycle closeout -- mixed in with complicated incentive structures.
The goal is to make money for everyone on the entire life cycle of the product, which as everyone who looks at financial statements from manufacturers knows, does not always end well. Many companies give away their merchandise to stay in business, sometimes for years.