Maintenance on that car is going to eat you alive. Price is about right. Start saving some money for repairs. The M5 has some reliability issues that go way beyond the E46. I am happy for you though, they are a nice ride...if I had money, I would get me an 8 series, but again....$$$$$ to maintain.
2006 M5 E60, "Lord Vader" Last real NA M series
German Car Fanatic