Canon is know for its MAP (minimum advertised price) policies, for example, to discourage resellers to make "special offers" outside its own ones.
It's a way to protect revenues by not allowing buyers to "get used" to lower prices, and, for example, making new product look "too expensive" when they are usually introduced with higher margins that will let them be discounted later when the novelty has gone and they are close to be replaced.
You usually need to be among the market leaders to attempt those policies.
Still, MAP is not MSRP, which is an attempt to fix the minimum retail prices. You can still sell at lower prices, but can't advertise them.