Best Class A Amp under $2,000 used?

Pass Aleph 0s. It has a lot of power, so it should be able to drive just about any speaker. Next to my Krell 250, the Pass was a much better sounding amp in just about every way. The Krell did bass a little better.

How much power you looking for? Is weight a factor, age, color?

Yes it is good question.  I want one silver in relatively good shape about 4-5 years old.  I'd like about 250 -300 watts.