I post these when I see them in this price range. I find plenty in the $8K+ range in my neck of the woods. Interestingly enough, this one appears to have water buffalo hide seats. Not my favorite but still interesting. This material could be found on the 745i with an M106.
http://sandiego.craigslist.org/csd/cto/5631273330.html
A good read for those like myself that aren already experts...
http://www.bimmerforums.com/forum/showthread.php?1952450-M30-vs-M90
http://sandiego.craigslist.org/csd/cto/5631273330.html

A good read for those like myself that aren already experts...
http://www.bimmerforums.com/forum/showthread.php?1952450-M30-vs-M90