” This is one of the coolest pieces of gear my dad ( original owner ) had! This is a super rare Electrocomp EML-500, only 300 were ever made ( compared to the EML-1* series where 1000 were made ) and rumor has it there’s far less still in existence. I don’t know how to gauge “perfect working condition” in these old synths, but I do know it powers on and I saw it played within the past few years.
It could use a little cleanup but is overall in nice condition with one major flaw. One of the slider top pegs has broken off ( shown in photos ) The tops are a little plastic cap that goes over a plastic peg, and the peg snapped off some time ago. This could be a really easy repair for someone who is handy with epoxy, as the two pieces fit clean together and the small plastic peg could be removed from the cap and glued back to the other piece. Beyond that, some of the markings have started to wear, there’s a little rub of the steel finish in a spot or two, and the wood has some marks on the back ( also shown ). Remainder of wood is actually nice with only minor flaws. If refurbished, this would truly be a show piece.” Click here to search for synths on eBay
“Vintage Casio CZ-101 Phase Distortion Synthesizer -TESTED. Condition is Used.
“Synthesis Technology E350 Morphing Terrarium Eurorack Wavetable VCO Module. Condition is Used. ” 
“Beautiful condition. Barely used.” 
“Teenage Engineering OP-1 Keyboard Synthesizer. Condition is Used. ” 
“Working – but the String section is quiet compared to the Brass and Organ sections. It has been serviced professionally by Antech Systems in 2012” 
“Moog The Rogue – great condition – Vintage analog synthesiser. Condition is Used but well cared for and maintenanced!
“Works perfect and sounds amazing. All of the controls and keys still feel new. It comes from a pet free, smoke free home. The original power supply is included. Checkout my other listings. ” 
“Selling my MC-202 in perfect operating condition and excellent condition just normal wear and tear for a synth of this age. Includes the “MIDI Jack mod”: a MIDI input jack that allows you to control the synth via an external MIDI source (see picture) which makes programming it a breeze. All knobs, faders, and switches work perfectly. It also includes the original power supply and battery door.” 
“Fully functioning every key and control works. Comes with Skb hard case” 
“Roland Juno-106 Keyboard Synthesizer. Condition is Used.” 
“It’s in rough shape, a few of the keys are chipped and the finish is patchy (see pictures). But, it does function.
” Roland RS-09 Synth organ keys synthesizer 44 keys rebuilt and tested. Condition is Seller refurbished.
” Used Roland TR-505 Rhythm Composer Drum Machine (conga pad not sounding but working) as is.” 
“Korg EX-800. Condition is Used. Missing button cover #6. Works great and sounds awesome.” 
“Korg Poly-800 Vintage Synthesizer Keyboard
” Selling my custom Korg poly-61 in great shape. Manual controls of cutoff, resonance, attack, decay and sustain have been added so you don’t have to menu dive for those common elements. I wired it so each potentiometer has a corresponding on\off switch for turning each parameter on or off. Midi in and thru have been added on channel 6. I proactively changed the battery to ensure there wouldn’t be any leakage or damage to the board. This year I cleaned and rebuilt the key bed. All knobs, buttons and functions work as they should. The synth sounds fantastic! The factory bank has been loaded in preparation for this sale.
“Up for grabs is my vintage Korg 700 Mini-Korg, Korg’s first synthesizer. I picked this up earlier this year at a local auction, but haven’t used it as much as I thought I would so am listing. It’s in decent condition for the age. Cosmetically, it has some scratches and looks like someone dropped their cigarette on the keys at some point in it’s life but that has no impact on performance.
“Yamaha DX100 Vintage FM Synthesizer.
“Yamaha DX27 Digital Programmable Synthesizer. Condition is Used.
“Vintage Yamaha DX27 Synthesizer
“Yamaha SY55 synthesizer workstation. Condition is Used.
“Offered here is a functional classic SY85 workstation complete with manuals, factory voice/setup disks and memory card, ideal for the musician who wants the Retro sound that these great keyboards produced.
“Drumtraks Sequential Circuits 80s vintage drumcomputer MIDI drums Roger Linn. Zustand: Gebraucht.” 
“The original Pro-One monophonic synthesizer from 1981. Please refer to online reviews of this legendary instrument for detailed technical specifications. Suffice to say this is a classic analogue synth with extensive modulation capabilities, powerful filter with the SCI unique resonance, two oscillators, sequencer and arpeggiator. There is only one Pro-One in terms of build and sound quality; naming no names, recent clones are decent enough machines but simply that: machines rather than instruments. Sure, the keyboard, or rather, keybed, is notoriously flakey, but not on this example. It was mostly triggered by a MIDI converter box rather than played direct during its working life. There are slight though noticeable abrasions on the right-hand wooden sides (see photos) but otherwise it’s in a fine condition.” 
“Absolute perfect condition! Recently tuned up to %100 by experienced technician. Very clean, calibrated, comes with power cable. Sounds amazing! This model has the desirable j-wire style key contacts” 
“ARP PRO-DGX Monophonic Analog Lead Synthesizer in excellent condition.
“Bidding is for both a Vintage ENSONIQ ESQ-1 Digital Wave Synthesizer with Analog Filters and a padded “Road Case.” Condition is Used. Fully functioning. “Battery Warning” (for saving settings) message lights – Battery can be replaced by a user with soldering iron, braid and solder, a screw driver, allan wrench and battery. I’d do it myself if I was going to keep it. Stored in the foam-lined case so there is virtually no dust inside. Keys are yellowed from age and one has a tiny burn mark but ALL WORK.
“Classic rack mount version of the Matrix 6 synth. 6 voices of Oberheim analogue 80’s goodness. There is one small segment of LED on the far right which does not light up, otherwise it’s working perfectly and sounds fantastic. It can run on either 120v or 240v by swapping a fuse (it is currently set to 240v).” 
“Barely used OP-1 in great condition with deck saver, carry case, radio antenna & original packaging.” 
” Oberheim Matrix 6 keyboard synthesizer (recently serviced by Borish Electronics). Condition is Used. Local pickup only.” 
“Waldorf Pulse – Excellent Condition
“Recently renovated and serviced by the Synthesizer Service Centre, London NW10 (invoice document included). Headphone output has a slight but discernible high-pitched tone; though audible it is not overwhelming. The line out is fine and clear. Three rubber pads on the underneath are missing; only one remains. There are light scratches and abrasions on the keyboard and casing. The battery compartment has suffered a detachment of the negative coil – please refer to the photographs. This does not affect the sound and is not a problem when mains-powered but means the instrument will not run on batteries unless repair work is carried out. I would say this is the most serious fault with the instrument and is reflected in the price.”
“emu sp12 non functioning. Condition is For parts or not working.
“This listing is for a Mountain Computing synthesizer set with original box papers and software, this was designed for Apple II computers, its very old. Compose beats like its 1979! As with all vintage computer hardware I sell this is sold without any guarantees.