Why so many Hegel's for sale?

I'm seeing a ton of Hegel units on the used market, especially the big daddy H590.  It seem to be a race to the bottom in terms of sellers trying to unload these things.  Nothing but good reviews online, but something must be up.  I have never owned one, but have always been intrigued.  The resale value though is always a concern for me as I swap out equipment every 6 months or so.
Any thoughts on these positive or negative?