My 2 cents worth and based on recent experience with an E38, its a great car. But it order to have in the 90 - 95% perfect range, be prepared to spend another 10 - 20k inclusive of wear and tear repairs, repaint if tired, refurbish if interior tired, rims and tyres to 18", etc.
So a 70k car, will bring you up to 90+ in no time. Ask anyone who treasures their E38. But this can do slowly, slowly lor
Anyway my 2 cents worth