Where can I find information about SAP Business Functions and their pricing?

Go to manufacturer overview

SAP provides an overview about the Business Functions in the SAP Service Market Place. To access this overview, you are required to have a valid SAP login (user name and password).

Source and link to the overview, retrieved 2017-02-09 (https://websmp230.sap-ag.de/sap/support/notes/1524246)