Used the 2000F/ 3200 combo, along with a ST-5000F tuner, for some 5 years. First powered a pair of Polk SDA IIs and presently Audio Physic Tempos (both 4 ohm speakers) without a hitch, all the while sounding magnificent. Have recently replaced them with a Yamaha B-2/C-50 combo and the same tuner. To my mind and ear the B-2 has a bit more musicality and a slightly better soundstage, but it's not a huge difference. Plan on having the 2000F and the 3200 serviced and upgraded. Not that they sounded like they needed it but, hey, they're 40 years old.
Got them during the housing recession and they have about doubled in price since then. Really tremendous, top of the line Sony gear. The build quality simply doesn't get much better. Still tend to be a bit cheaper than a lot of classic gear likely not as good. Probably the result of having sold thousands of these units and the fact that not too many people got hip to TOTL Sony gear.