The only price collapse I've seen is the Levinson 53 in the used market. Switched output stage technology has long way to go.
High End Amp Price Collapse musings
If Class D amplification becomes accepted by audiophiles there should be a glut of high end amps (Krell, Levinson, Pass etc) becoming available on the used market at prices a fraction of what they are now.
Think CRT TV when the flat panels began emerging.I think Ill hold off on a new/used amp purchase for a little while. Maybe I will bet a Boulder.
Has any one else considered this?