“This item is,
It is a DX 100’s thing.
MIDI / IN, OUT, PHONE, LINE OUT,
Power supply and terminals are confirmed.
Image ② upper left PITCH (pitch vendor) has trouble, because it was holding with tape, there are tape marks.
Image ③ There is also a tape mark on the battery cover.
The appearance, the keyboard, the button, the display, the inside of the battery holder are also beautiful, there is no trace of liquid leak, but there are dirt, scratches etc due to aged deterioration.
Other than that, there are not particularly conspicuous parts, I think that the state is good.
The exhibit is the main body ? AC adapter.”
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” This item is like New and never played out. Ram Battery brand new. Made in Japan,this is a great little Synthesizer.” 
“You are bidding on Yamaha DX100 DIGITAL PROGRAMMABLE ALGORITHM SYNTHESIZER with original Yamaha power supply.” 
“Selling my faithful dx100 which I’m abit sad about but it’s not getting the use any more.
“YAMAHA DX100 Classic vintage synth in good nick but three black and four white keys in the third octave not responding. Should be a fairly straightforward repair.” 
“In great condition, does have a few marks here and there. Can be used with batteries (not included). Battery compartment lid intact, clean battery bay with no signs of leakage. Has had a new lithium memory battery installed. Comes with suitable non genuine power adaptor (UK spec). Guitar strap pins have been removed and are not included.”
“Good condition,normal scratches” 
“This is an absolute must for any collectors, I purchased this synth in 1987 from Soho Soundhouse in London, I still have the original receipt. It has the original packaging, the box, the accompanying cassette’s, playbooks etc. The books even have the original bags, this is a mint collection, I have looked after it and probably never intended to sell, but I want to purchase a workstation.
“You are looking at a previously owned Yamaha DX100 Synthesizer. Does NOT come with a power cord. It is missing the back battery cover. The 2nd to last black key on the right side is stuck- when you push down it doesnt really go down all the way. The white key next to it appears to be broken and fixed at one point. When you turn it on the screen says “CNG RAM Battery!”. There is no sound that came out of the synthezier- we do not know if there is something else that is missing to make this happen or if this is how its supposed to be because it needs to hook up to something else. Overall its in good condition with standard wear and tear.” 
“Classic Synthesizer. Works great.
” YAMAHA DX100 SYNTHESIZER WITH AC ADAPTER and BATTERIES. ALWAYS CARED FOR, Some MINOR COSMETIC MARKS.
” Yamaha DX-100 in overall very nice condition. Some light scratches.
“Original 1980s Yamaha DX100 4-op FM digital synthesizer for sale.
“Comes with power supply, midi cable, output connector. Used very little. Satisfaction guaranteed” 
“Hello, this auction is for a Yamaha DX100 FM synthesizer. It’s a classic house and techno synth and sounds awesome. It works and looks great with some minor cosmetic issues – most notably it’s missing the volume slider cap (but the fader still works). There is some light scuffing and wear on the synth but nothing too major. All the buttons and keys work. The battery cover is intact although I’ve never operated it with batteries. The DX100 has been reset to original factory settings, and a Yamaha power adapter is included. The synth will be bubble wrapped and safely packaged with foam, and insured for the amount of the winning purchase. I love this synth but it’s time to part with it, so now it’s your turn to imitate every 90s Autechre track :)” 
“Classic ’80s synth in mint condition and working perfectly. Includes, manual, carrying case and power supply.” 
“Middle E needs to be replaced. It works but its not as smooth. Otherwise, keyboard works great.” 
“Yamaha DX100 in Very nice condition. Works perfectly.
“Auction for a Yamaha DX100 FM Synthesizer. Some minor cosmetic flaws, but is fully functional to my knowledge (tested, powers on, makes sound, all presets are functional, pitch controller, oscillator wheel, volume slider, etc. all working). Not skilled enough to have tried to make my own patches. 
“Selling a Yamaha DX100 in fantastic condition. Sounds huge, warm, gritty, and super expressive. A few light scuffs on this vintage gem hardly noticeable. Looks close to mint and all buttons, keys, sliders, and wheels work perfectly.
“Great Yamaha FM Synth!!! Sounds and works great!!!” 
“Gently used Yamaha DX100. Cosmetically and internally In great shape. Sounds Great…All keys buttons and functions work as they should. Also included are the original Play book manual, Play book tape, owners manual, voice programming guide, factory sealed RCA cables. No power supply (but power supply does work correctly). Works with 6 C batteries, not included.” 
“YAMAHA DX100
“YAMAHA DX100 SYNTHESIZER in Good Condition. All functions, buttons, keys, inputs and outputs work properly. I am the original owner. It has never been outside of my professional studio. I have always used it as a MIDI-controlled sound module as the keys are really too small to be useful. But the sounds that come out of this unit rock!!!!!! All sound waves are programmable so skies the limit. There are a couple of minor cosmetic scratches but they really aren’t very noticeable. It is truly a powerful, rare synthesizer with unique sounds and portability. Includes AC adapter and original manuals.” 
“This is a Yamaha DX100 in good used condition. It is fully functional, and cosmetically it looks quite clean considering its age. I will include a power supply and batteries.” 
“Keyboard is in good physical condition. Some imperfections here and there. The universal power adapter I tried with it did not work, I do not know if it didn’t work because it is not the standard power adapter that comes with this keyboard. It does turn on with batteries. There is a section of 13 keys between the bass and treble side that do NOT work. All the other buttons prompt different reactions on the screen. The contrast dial work. The output quarter-inch Jack works, both of the bend dials toward the top left of the keyboard work. I tested out as much as I could. I am not guaranteeing I know every single thing wrong with this unit. May just be good for parts. May be easily fixed it could be a user error on my end. I cannot say for 100% certainty.” 
“This is a Vintage 1980’s Yamaha DX-100 Synthesizer Keyboard Electronic Piano Digital Midi Synth. It is in fair cosmetic condition with wear from use and age, there is some cracking in the back plastic panel. The synth has been tested and it powers on, the screen works, but only several keys have audio output, the other keys make no noise. Because the synth is not fully functional it is being sold as is for parts or repair. ”
“Pre-owned Yamaha DX-100 Synthesizer
“Yamaha DX100 for sale in good condition for its age.Used only at home as a midi keyboard.” 
“Barely used Yamaha dx100. With 7 custom talkbox patches. Cosmetically and internally In great shape. All keys buttons and functions work as they should. Also included are the original manual and a soft gig-bag. No power supply (but power supply does work correctly). Works with c batteries.” 
“The unit with all of the keys has an intermittent output jack (I use the “phones out” jack instead which works just fine, It is also missing one fader knob (easily acquired online) but the fader itself works perfectly. Otherwise it is in perfect working condition. The second unit has obvious problems with missing keys (also easily found online) and because of this there is a delay in the remaining keys. BUT it works perfectly fine as a remote keyboard module when midied from any other midi unit! I’m including the Yamaha 12v power supply as well as a new midi cable. and one new set of c batteries (installed)” 
” Classic board for all your synth explorations” 
“This listing is for one Yamaha DX100 FM synthesizer. It is in good shape, sans a few keys not responding appropriately. This DX100 can be played fine via MIDI and sounds superb. This listing includes an appropriate DC adapter.” 
“Vintage, Excellent visual and working condition” 
” Used yamaha dx100 with original book manuals ,in very good condition well taken care of”