How well do the Gen 1 (R53?) cars cope with high mileage. I'm about to but a Gen 1 Cooper S, a couple of cars I've been looking at have had high mileage 80k +. Is there anuthing in particular to look out for. I'm assuming that if they've had main dealer servicing that they should be pretty sweet?? Would I be better off spending the extra cash on a lower mileage??