SAP MM Certification guidance!!!

Hi all,

I am working in a Procurement & SAP MM Support project and want to have a certification in SAP MM. I have done a lot of browsing on internet and gathered information on SAP MM certification. However still all these information is messing up with each other and I got confused.

Could any one please guide how can i get certified in SAP MM and provide valuable information in a straight way. like how to get certified and from which institution? as there are multiple who provides certification as well there is SAP itself provide this certification and how much it will cost? from where i should pursue this certification? from where it will be better to get certified, from SAP itself or other institution?

Thank you.