Best Class A Amp under $2,000 used?

Why did you want pure class A.  As all have said most amps are high biased to hold in class A until a threshold wattage requirement is surpassed then it operates in A/B. I have never been sure of when Class A resumes during a peak then drop .   I owned Klipsch Palladium 1Ks which were biased to class  A for 125 watts.  I never knew when it changed.  *not a great amp anyway!

I guess he is saying we like a certain sound or sonic we came to appreciate when we were younger and still want it despite advances in technology.  It is true, we like what we like and want that, as do many in our age group (boomers)  or cohort, which creates the demand against which supply or build costs, leads to the prices we are willing to pay.