I might get one on a local aucitons site for a low risk price. Unfortunately, the WM EX range is a real jungle, with Sony putting out half a dozen new models every year throughout the Nineties... If you had the chance to own one, please share your opinion!...
The WM-EX650 is part of the list with potential problematic clutch gear. Link here: https://stereo2go.com/forums/threads/wm-ex-series-tac-tac-sound-repair.7108/ So, depending on how the unit was used and stored it might need just a new belt (which is very easy to do) or more. My opinion is if you do go for this particular device, search for one in good condition that has not been used a lot.
