Firstly there are two institutes for SAP courses – authorised & unauthorised
Authorised -siemens or genovate – FI ( above 2L) & if elearning (below 2L)- you can appear certification exam conducted by SAP AG, which will cost you approx 30k.
unauthorised – many – check advt in local newspapers- charges will be between – Rs.12k to 50k- cannot appear for certification.
Employers mainly prefer only certified professionals.
hope it is clear