There's so many different variables that could sway a buyer...but my only warning would be to really be careful if you're about to throw money down on the e70 X5 50iX (N63 V8).
All the V8s from the histrionic M60 (Nikisil issue)...forward to the N63N...all have had their issues...but the N63 (2010-2013??) seems to really be troublesome and for me...has fallen into the category like the M60...be VERY careful if considering the purchase of one....especially since their prices are dropping due to their bad press. Make sure you understand what's going on with the 50iX before buying...go in with your eyes wide open.
