My Genesis has been at the dealership for over 2months having a ABS/Hydrualic Module System replaced. After replacing it they could not get the ESC and ABS codes cleared. Now they are telling me that I need to have an ECM put on to get the codes cleared and that will run around $1200. I have noticed that I could purchase an used one at a much cheaper price. Just wondering would that be a waste of money in purchasing an used one?