E39 M5 M Par staggered 18" wheels?
 

These appear to be factory on the face but no BMW markings on rear. Anyone have any idea of mfg of these wheels and would it be possible(or worth it) to find 2 more that may match.
I have a 04 525i and was hoping to possibly use them. Guy I got these from said they came off of a E39 M5. 18x8 and 18x9.5 .

They don't appear to be OEM. My suggestion would be to determine what style they are from All BMW wheel styles | BmwStyleWheels.com and then Google for that style reps and see if any suppliers turn up. Good luck!