Roland SH-3

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via this Reverb listing

"A special early synth from Roland in overall great functional condition, with two exceptions note below. Cosmetically the control panel and keyboard area are in nice shape, but the case is pretty beat up, with bad latches, missing metal piping on one side, bent piping on the other side, and a missing power cord door. According to the previous owner, this unit actually went out on tour with a pop band in the 70's, and it shows. As you probably know, the SH-3 gave way to the more common SH-3A, with the most noticeable change being the switch from the SH-3's diode ladder filter to the the SH-3A's transistor ladder filter.

I've thoroughly tested all functions, pots, sliders, and jacks and here are the two functional issues I've observed:

The output and headphone jacks are scratchy and presumably need to be cleaned. It's easy to get an output cable or headphones seated and working, however you may have to twist the plugs in the jacks or reinsert them to get a good contact.
There is some bleed-through from the square/sine LFO that's present in the audio path, most noticeable at quieter volumes or at higher registers. It's not difficult to set up a sound where the bleed-through is either not noticeable or barely noticeable, particularly with everything running loud and with lower waveforms engaged. I have access to another SH-3 that has the same problem (but worse), so I suspect this may be a problem that Roland engineered out of later the SH-3A circuitry, but I can't be sure. Regardless, this is something you may want to attend to at some point should you find it bothersome.
In addition, the 8' "chorus" setting on this and the other SH-3 I've played is noticeably more intense than the SH-3A's I've played, so I suspect this is another feature that Roland tweaked when shifting to the SH-3A circuits.

I recently put $730 into having the synth partially serviced by a noted synth tech, which included:

Fixing an issue whereby the waveform sliders were interacting with each other and significant bleed-through of some waveforms was present.
Cleaning the keyboard and eliminating some squirrely notes and double triggering that had been present.
Replacing some capacitors.
Better securing base of the power cable.
Cleaning a scratchy sider.
So in selling this I'm mostly trying to break-even on those repairs, plus make a little to cover Reverb's fees."