"used 1210s when I used to DJ as a youngun, was never *that* impressed with the quality through a hifi amp / phones, and I've no need for frippery like direct drive or pitch control "
And quite right too, if you're a jobbing dj, they're a damn good choice,spin up speed is great, indestructible, however for home listening, pretty awful, through almost any amp you can hear the motor churning away through the dd, and the standard non fluid damped tonearm is pretty poor by rega/project standards.
Second hand ones generally will either have been trashed by bedroom djs and will have had Stanton/ortofon cartridges fitted badly trashing the arm,used by jobbing djs and battered but functional, or will have been really well looked after and still cost a fortune.