I really love tonearms even vintage ones, small micromechanical objects and I collect them; all the arms I buy in the world I send them to a trusted micro mechanics laboratory to have them overhauled.
The vintage tonearms bought used must always be revised if you want to keep them in perfect efficiency as new; bearings with hardened and out of tolerance grease and a lot of dirt stuck to it ... hardened and dried out connecting cables, lifter not work or without siliconic grease and other problems that are not noticed take functionality away from the initial design and the cartridge will never track to the best of its ability.
Around $ 150 should always be budgeted for an overhaul when buying a used vintage arm as they are delicate mechanics like watches, the tonearms at least once they must be serviced after purchase used, this is a guarantee of perfect functioning for many years to come.
