Its been 10 years since this thing was released and finding one now is pretty difficult. The predecessors, m-504, m-506, and m-509 have nearly doubled in price over the past year on ebay. Which leads me to believe that there is still a market for a big VU amplifier like this, and I think Onkyo pulled the plug too early on the m5000R. Hell, they pulled the plug before they could get the Pre/Pro PR-RZ5100 out. Wasted opportunity....
To the guys that own the M5000R, I would never let it go because it seems highly unlikely Onkyo will ever make a big VU amplifier again.