I never bought a used amps other than from my audio dealer who accept return for up to a year if something goes wrong. I did start with used ADCOM, then went to new Carver Monoblocks in the '80s and settled with the Krell Class A stereo amp which I bought in 1990. Thankfully its still kicking up to now powering my Apogee electrostatics.
imThorek
imThorek