“This is a genuine M-500 Korg Micro Preset SP, the very rare model with the built-in speaker.
Please note that two of the presets don’t work – these are they Synthe 1 and Synthe 2. This is a very common issue with these synths but can be fixed by replacing some of the capacitors.
Otherwise it’s in good shape. The sound can warble a bit, again a common issue with a synth that’s forty years old. But it’s a great bit of kit.”
Click here to search for synths on eBay