Just got reply from the Crevier BMW :
The part number is 51-71-0-017-315 for $795.00 + tax 61.61
Our service department charges $650.00 in labor to install them.
Total parts, labor, and tax is $1,506.61
Please let me know if you have any further questions, or if I can help schedule you an appointment.

Thank You,
David V. Rice
Parts Deptartment
Crevier BMW

Assuming DIY the installation but the parts are still 795 + 61.61......Man where is that 500USD running board, or do I have to bargain for it thru email!? A little help? Thanks