Eye Patch Productions - Korg KPR-77 Restored back to 100%! Most people replace the switches and they can be pretty easily fixed like on a Polysix or a Poly61. Build quality is
Korg KPR-77 Rhythm Analog Drum Machine w/ original adaptor, papers, box | eBay
Korg KPR-77 Rhythm Analog Drum Machine w/ original adaptor, papers, box | eBay