“The Korg PolySix is an amazing early synth dating to 1981. I obtained this model in the 90s from its original owner. It’s a six-note polyphonic analog beast with built-in chorus, phaser and “ensemble” effects. It’s got 32 memory slots for voices, which can be backed up to old-fashioned cassette tape. I believe this is the model they used for “The Final Countdown,” so you KNOW it’s awesome. Tears for Fears also used a PolySix, and so did Keith Emerson (who I’m pretty sure used every synth). This machine has never been on the road, it’s original owner used it for home recording and I used it for taking up space in my basement. Somewhere along the line, it simply stopped working.
This keyboard has some chipping to the woodgrain finish on the edges and corners, and is missing a few of the little buttons on the top. The buttons themselves appear to work, but they’re all sticky.
PolySix keyboards have had some reliability issues in the past, and this one needs to be serviced. It currently does not play. The PolySix has a NiCd batter that needed replacement, and it is unlikely that the one inside this model has ever been replaced, so that might be the issue – it powers up just fine, but no sound comes out. This is being sold “as is” with no returns.
Reverb dot com shows past sales of these ranging between $800 and $2000, with POOR condition examples selling in the $800 range. This one definitely qualifies as POOR; it’s yours for $700 plus shipping, which is a great price if you know how to service these (or know someone who does). This is a truly monster synth, one of the earliest affordable synthesizers.”
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“Here for Sale, I present the Fabulous Korg Poly Six! This is a 6 Oscillator Keyboard that along with the Equally Fabulous Roland Juno 60 (Which I also own) was released in 1981 and turned the world Upside Down!
“Korg Polysix Synthesizer. This is the one you’ve been waiting for! Excellent cosmetic condition, excellent functionality. All functions work as they should, all knobs turn smoothly, all buttons respond easily, all keys trigger as they should. The battery has been replaced with a CR2032 socket type battery and holder so that in the future, probably way out into the future, the battery will be very easy to change without having to solder. There are a few tiny scratches here and there and there is slight damage to the very corner of the wood sides. The circuit boards are clean. This keyboard was fully serviced recently and it shows in how it plays, sounds and responds.”
“Korg Polysix Keyboard Synthesizer. Condition is For parts or not working. Shipped with USPS Parcel Select Ground.
“Korg Polysix Keyboard Synthesizer w/Kenton Midi. I had this serviced last year. Tuned and original patches added. Original owner installed the midi and moved battery off of PCB. Corners of the casing have damage as pictured. Will be shipped in original case. Sold as is so ask questions before bidding please.”
“Original owner of this Korg Polysix Keyboard. Was put away for awhile and has minor battery problem common with this keyboard. I removed the battery and one IC. See Pic’s I was going to repair and sill might if I can not sell for a decent price. Keyboard is in very good looking condition. Includes all manual’s and program tape to reload sounds. Sold AS IS Not working condition.”
“An amazing analog synth from the golden era. Serviced as of 4/19. Condition is Used.”
“The CPU/battery board was replaced with a good used board. All Key bed contacts cleaned. Power supply rebuilt. Photocoupler replaced. Recapped, calibrated, cleaned and professionally serviced by Analogics in Cleveland, OH.
“Korg Polysix vintage analog synth.
” This is an original Korg Polysix Synthesizer, made in Japan. This is my father’s keyboard as he has given me permission to sell it. He states that he has owned it for 40 years, but after getting a new keyboard 30 years ago, this one has been collecting dust.
“KORG Polysix W/Kiwisix Upgrade, Restored W/ PSU upgrade and synthgraphics overlay.
“Excellent Condition”
” * powers up but NO SOUND
“Available for purchase: a Korg Polysix synth, upgraded with a new Kiwi Polysix power supply & CPU/MIDI board, a Tubbutec Polysex osc pitch/drift board, and new key contacts from LA Synth Co. Also included: original manual, Kiwisix box, and original Korg synth brochure. Everything is in solid cosmetic shape and works great. The keys feel brand new after the contact upgrade, and the knobs & switches are smooth and responsive. All button switches have been replaced. There are a few surface marks/scratches on the exterior of the case and could use a thorough cleaning overall. Please see photos for more detail. So there are no surprises, the inside of the case is cracked on the left side, causing a small opening in the rear. This isn’t visible on the side and doesn’t cause any instability. Beyond that crack, it’s a solid unit all around and definitely a one-of-a-kind synth. Sort of sad to see it go, but it isn’t being used as much as it probably should be these days. MIDI, audio, and power cables included.”
“I have a Korg polysix here that is for parts or repair. All of the control buttons and knobs work. However I can only get one key to work if that. I’m assuming it’s from all the dirt and dust that has gotten in it over the years. It does power on” 
“Korg Polysix analogue synthesiser.
“I am selling my immaculate Korg Polysix. The unit is 98% mint and new. It has a few tiny imperfections but is the closest to NEW on eBay. This Polysix has been loved by me for 15 years. Everything works flawlessly and it is as reliable as a new synth. I went ahead and updated it to the full KIWISIX mod. It has the new KIWI power Supply, MIDI Kit, and updated presets.”
“Works well , incredible sound ~ good condition cosmetically with only a few nicks, overall very clean! please see pics” 
“Most of the keys are not responding and only 5 of the six voices are working. The VCF (filter) seems to be ok as is the Envelop Generator and, it would seem, all the other tone editing functions. The programming section isn’t operating.
“I was given this by an old gearhead who worked with Blur.
“Korg Polysix PS-6 made in Japan. Good condition but has a battery leak and is in need of repair. Does power up and make weak sounds. Sold as is with no returns.”
“Pulled out from storage to find my Mexico excursion.
“Korg PolySix AS-IS but I got sounds from it as they change when turning knobs,switches and wheels.. I got this from a friend who was a smoker back in he day..It dosen’t smell now, But some keys have burns..I was going to Rebuild it,but I’m playing again and don’t have the time..I’m selling it for parts but WILL NOT Break it up!!! It comes with Owners manual,programming charts and a cassette..I was going to try and load the tape,bit I don’t have a cassette player.. The Battery did leak,but since it was stored standing on it’s side,it don’t look bad.Metal case,Knobs Look great!!.”
” I am rather sadly selling my beloved Korg Polysix. This is a genuine analogue synth, first manufactured in the early 80s. I bought this particular Polysix from a friend back in the early 90s, and I believe this friend purchased it new. Over the last 25 years I have enjoyed playing this synth in a number of different musical ventures and styles, but now demands of space and cash mean I need to put it up for sale.
“I bought this a couple of years ago for a number of projects and just fell in love with its incredible sound (so so warm – think Boards of Canada for a simple idea). I bought it in the same condition (with the same sticker) for a significant amount of money as they are quite hard to find. It had just had its electronics cleaned out and tested (hence the rather annoyingly glued modulation wheel area – see pix). It has some marks here and there but plays beautifully – remarkable for these synths given their age. It has never been toured and only kept in studio. When not used for recording this was always covered and protected carefully. ”
“Great conditionTested and worksMight have cosmetic minor imperfections”
“This is a Korg Polysix 6-voice synth from 1981. Everything is tested and works great. I built a new clone programmer board for it since the old one had some battery leak damage. The new board is a clone, functionally identical to the original. No new or changed functions. This board has the memory and knob scanner circuits. There is no audio path on this board.
“Korg Polysix Keyboard Synthesizer PS-6 as is with super rare original hard case
“Selling my beloved Korg Polysix. Just moved and need the space. It has the modysix poly upgrade which more info can be found here
” This is a very nice, excellent condition Korg PolySix, that has KiwiSix upgrade installed. When ch gives it many updates features, including MIDI, and extra patch storage. I built a custom walnut case, which it is installed in. It looks fantastic, and plays like it looks. I just had it serviced, do it is ready to go. I’m the 3rd owner, and at least while I’ve owned it, about 4 years, it has never left my smoke free studio, until recently when I had it serviced. It comes with a brand new road case, korg owners manual, and original setting charts.
“Unit powers up & sound does come out. ” 
“Also, includes Tubbutec installed “Mody Poly” MIDI kit.
“Cosmetically it is not so pristine. It is structurally sound, but you can see in the pictures that there are chips in the wood, the panel is scratched, and there is a plastic button missing, which I am sure you can source, and the underlying switch works.
“Cosmetically it is not so pristine. It is structurally sound, but you can see in the pictures that there are chips in the wood, the panel is scratched, and there is a plastic button missing, which I am sure you can source, and the underlying switch works.
“Korg Polysix Vintage VCO Analogue Synthesiser – UK plug, 220V.