The ML series are still wonderful. I agree that this is simply a matter of financial situations being very low and slow right now. Everything is cyclic and the used market will rebound just like the home market will. Sort of. in the case of the home market, it had escalated way out of control to the point of insanity. people sitting on the sidelines knew (no way were houses worth that much). reality caught up with the market. For audio, well with people worried about their families and jobs, buying items that don't feed, house, educate, etc. your family take a back seat. If you are not in a rush or desperate for cash, be patient. Prices for decent high-end equipment will come back significantly. However, keep in mind that when companies change their equipment or redesign every other year, that kills the resale price of used equipment. These companies attitude is to always have something new (not necessarily better) being reviewed).
A great pre-amp or amp are just that. they will survive the test of down times. Speakers also.
enjoy