CyberLib is the vision of a library whose essential functions, objects and services are offered in an artificially created environment. Making available different work environments that meet the individual user's needs is a very special characteristic of the capacity of CyberLib. Every vision has to be checked for its economic feasibility. How can CyberLib charge its users for its services with the clear target of making a profit and thus enter an open and measureable competition with other CyberLibs in order to create a calculable and transparent information market? The paper will discuss different possibilities, such as autonomous profit centers, the coexistence of conventional information sources and CyberLib and other forms of financing, e.g. by means of advertising.