Nikasil Info:
http://en.wikipedia.org/wiki/BMW_M60
& search for Nikasil on this forum you'll find stuff ad nauseum.
That car is at a low enough mileage where I would still be worried about the nikasil problem appearing. Although it can appear at any time on a nikasil engine, it is more likely to happen during 'low' mileage.
Price is very high for the car, I understand the low mileage and manual trans (mine was priced pretty high because of manual trans as well), However, if I were in your position and had 9-10k to spend, I would personally be looking for a 540i 6 speed, which are also rare, but one could be had for the price range you're talking about.