I think the E60 prices will really, really suffer in the next few years... I cannot see where the market is for them? SMG box is horrifically expensive if it goes pop, which is happening quite a lot if you go on pistonheads M power forum, and the M5 board! The cars under warranty will be ok, but when they start dropping off the BMW programme, who will put up with single figure MPG & huge running costs?
Most people won't run it as a daily due to costs, but would many people see it as a toy to tuck away for the weekend? Epic car though, once they drop below 10k I might be tempted in the future!