maintain the car. if you do it should treat you very well. sometimes it can be quite a bit of $$$ but its better than the unexpect sh!t that could come up if you neglect little things.
your not going to find too many 330's because they were only made in 06.
I just bought my car, if you search you ll find a bunch of threads i started about what happens when you hit 100k +.
nothing too bad as long as you keep with things. Just remember, cars coming out of Germany require lots more attention than Japan. So if you have a honda, toyota, etc prepare to do more than you are now.
2008 328i 6spd
1995 Z28 6spd - 377rwhp rip