“KORG POLY 800 MK1 New Battery mod and the Moog Slayer/ FM Mod
The Korg Poly 800 for sale here has been completely cleaned and restored to perfect working condition. All keys contact and rubbers have been cleaned and working.
A new battery holder installed for easy swap. The C Cell battery compartment has been disabled so no more worries about acid leaks, as the new battery retains all the patches.
Moog Slayer mod gives you Frequency and resonance control that sound GREAT !
12/24 DB filter selector switch and a FM control. With these mods and the synth restored its now an even greater synth. Korg should have built it this way !
Comes with A/C adapter. original owners manual.” Click here to search for synths on eBay
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“This is probably the most difficult sale I have ever made, in fact I have wrestled with selling the DX over many years as it has sat sadly idle in a corner gathering dust. You see that is a crime in itself as the DX100 is aguably the best DX vintage synth in my humble opinion and I’ve owned a few (dx7, dx200, TG300, TX81Z, FS1r…I fecking love FM). The reason is simple, the DX100 is light and portable, it has only 4 operators which means has just enough complexity without getting overwhelmed in the FM labrynth. Unlike other, cleaner more modern FM synths, the DX has a lot of quirk, weird envelope hangs depending on how you clip the keys that you just dont get on other synths- its unique and with a bit of grit that you just dont get on modern synths.
“According to Ray at Fair Deal music in the Bullring,Birmingham, where I bought this c.1990, this Yamaha DX7 used to belong to TheDamned.
“Original owner. Very clean, no tobacco exposure, completely functional. Includes original manual, sustain pedal, music rack, soft bag. Ground shipping paid by buyer — Continental US only” 
“Good condition. Powers up and plays.
“For sale I have a Yamaha DX21 Digital Programmable Algorithm Synthesizer which is in very good pre-owned condition. Please note the keyboard only comes with power cord – no other cords are included. ” 
“This item is fully functional, please see photos for cosmetic condition. Includes Manual.
“You are bidding on Yamaha DX7 classic synth. The keyboard was completely tested after sitting on a shelf for last couple years and absolutely everything works as suppose to be: all keys, display, all buttons etc- all work great. meanwhile the synth needs to be filled by sounds. We lost all patches about 2 years ago, so battery was replaced, also power cord was replaced on new one, but we never got any cartridge to fill keyboard by sounds. So I recorded some sort of spacy patch #1 just to get sound and test keys and all functions. you’ll need some cartridge or you can do it by yourself but DX series is kind of difficult to program. anyway, it’s possible and it takes time. Cosmetically the synth has some marks and imperfections here and there, but after all it doesn’t look bad for basically 40 years old instrument and cosmetics doen’t effect on functionality at all. Due an age and vintage nature the synth goes AS IS. But as I said she does works great, just fill out by sounds. we put very reasonable price. Item will be well packed and insured, see all pictures.” 
“The power of 8 DX7’s in one rack module. Amazing piece of gear. Will come with all 8 batteries of each tf1 unit replaced with brand a new battery. Also includes extra cables to wire:
“Amazing cosmetic condition for this legendary piece of Dance history. Famously known for its use in Detroit House among many others. I have tested the keyboard and it works great other than a couple keys that are semi/unresponsive. I’m sure it’s just a trigger contact issue inside (most likely due to dust). I’m listing at a great price. These are super hard to come by now especially in this good of condition!!” 
“Synth is in really good shape, few minor scratches here and there, but nothing is broken, see the pics. All keys, buttons and sliders work fine. Memory battery has been recently replaced, so it’s good for another 10-15 years. Comes with original Yamaha hard plastic case with foam inner lining, made specifically for DX21. Not the generic Gator case you may see in Guitar Center.” 
“This is a great small mono synth imported from Japan in the 1970s. It runs at Japan 100V but works totally fine in the US at 115/120VAC. I do have a step up transformer I will include for an extra $20 if you’d like.
“I checked the basic operation. There was no malfunction of the button response, and it worked normally. Basic preset sounds were output from all the keyboards.
“This Yamaha SY35 Digital Synthesizer with Dynamic Vector Synthesis is in excellent operational and physical condition as shown in the photos. This sale includes the KACES Soft Carrying Case with 2 large zipper pockets, the Eliminator VDC 12 Power Adapter and Yamaha Foot Switch as shown in the photos.” 
“This was the desktop version of the DX7. Great condition.” 
“Fully functional. Recently serviced and cleaned.
“VINTAGE synthesizer! ! Prophet – 5 Rev.3.3 has arrived! PROPHET – 5 is a 5 – pitch polyphonic analog synthesizer which was released from Sequential Circuits Company in 1978. This is REV 3.3. Memory 120 tone color, MIDI loading model becomes. The internal chip is made of CES (Curtis Electromusic Specilities), voltage control”
“It was released models in the mid-1980s.
“I can’t get the string section to work and I’m not the man for the job. My loss your gain! NO reserve! Happy bidding!” 
” Extremely rare Electronic Valve Instrument. Built by Neil Steiner in 1975(one of 200 produced). This particular unit is in museum condition. Please note that the voltage is set for 220, so if purchasing in the the States you’ll need to also have a power converter. ” 
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“Oberheim Matrix 6R rack mount synth.
“Access virus C for sell. In great condition with no scratches, also in perfect working condition. This synth sounds amazing and is very versatile.”
” This item shows mild cosmetic use”
“Up for sale is a (1) vintage Synton Syntovox 222 ten band vocoder, made in Holland. It’s the later version with noise knob for the upper three channels. The vocoder is working fine and sounds very good! Cosmetically it’s in nice condition for its age, but there are some minor signs of use and little scratches on it (see photo’s). It’s working on 220V and the serial number is: 222.0413” 
“comes with
“Italian made GRP A-4 Analog Synthesizer
“A rare Electronic Dream Plant Wasp Synthesizer, serial # 001133, in working condition. Purchased from a US EBay seller in March 2016.
“Never used…
“Bit One analog Synthesizer – Made in Italy – Vintage 80s -RARE
“Octave The Kitten Synthesizer Keyboard
“Here’s a very nice and clean Moog Source. It sounds great and has a good panel as well as the incremental controller is accurate and smooth. You will need to get this serviced and calibrated to be 100%.” 
“A Moog Polymoog 203a analogue synthesiser, 1977.
“Cosmetically in excellent condition but it needs minor maintenance.
“Roland JX3P inkl. PG200