Pet peeve of mine is "calibrating" bench power supplies just because they have meters. The accuracy of the meters on PSUs is not good enough for many tasks so marking them calibrted incourages in-appropriate use. Any accredited workshop I was invovled with has PSU meters marked "Indication Only" with standing instructions that DMMs were to be used for checking.
I've got to mention that my Power Designs 2020B has a single 0-20V analogue meter, but the voltagecontrols are
much more accurate than that. They
are accurate to 1mV. And if you twiddle the vernier, you can set to ~10uV, albeit with a little drift.
But of course you make good, sound points
Seeing "for indication only" on auction equipment gives a hint as to its provenance.