What is Fixed Price?

Legal Definition
The term fixed price is a phrase used to mean the price of a good or a service is not subject to bargaining. The term commonly indicates that an external agent, such as a merchant or the government, has set a price level, which may not be changed for individual sales.
-- Wikipedia
Legal Definition
The term fixed price is a phrase used to mean the price of a good or a service is not subject to bargaining. The term commonly indicates that an external agent, such as a merchant or the government, has set a price level, which may not be changed for individual sales. In the case of governments, this may be due to price controls.

Bargaining is very common in many parts of the world, outside of retail stores in Europe or North America or Japan, this makes this an exception from the general norm of pricing in these areas.
-- Wikipedia