My recommendation would be let it pass ... Don't get that car it stood idle for some 2 years (see the report) some 2K + miles between 2009 and 2011. Generally a nice car, however I would not get it without a complete inspection at BMW.
On the other side of the coin, I loved my e46 2002 SMG purchased at ~ 20k miles in 2005 it was a lease return, then sold her in 2010 for $25K at ~ 50K miles. The only issue this car had was two rear spring replacements and then normal maintenance. I am still in touch with the new owner he now is nearing 75k miles
So all in all a great car, however, it's not a e9x ... Then I'm certain you know this Mike ... Good luck!