“This Vintage Six-Trak Synthesizer is fully functional and in Very Good to Excellent Condition. The synth has been well taken care of with all knobs and pads intact. The wood side panels and keys are clean. The keyboard will come in a RoadRunner Flight Case measuring 29 x 18 inches. The case has some dings but has kept the keyboard protected. Please see our photos. ”
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“Great condition, recently fully serviced. Sounds great! ”
” Due to emergency, need to sell some synth stuff. Up for auction is one Sequential Circuits Six Track Synthesizer. This synth is functional and sounds beautiful, but has some issues. First, the rubber chicklet buttons are terrible, they should be replaced. Sometimes you can get them to work. Second, the power switch is stuck in “ON” position. Good news is it also comes with some extras. This auction includes the Sequential Circuits foot pedal switch. This switch is a helpful assist to work around not having to use some of the very finicky buttons. This unit has been upgraded with the Wine Country IC, so it handles standard MIDI. I’ve included the original chip in the tube the upgrade came with. I’ve also included some other Wine Country paperwork and a new capacitor. Despite the issues, I know this machine makes beautiful sounds, but due to personal emergency cannot test all other functionality and this synth is being sold “AS IS.” Thank you.” 
” The synth has been taken apart, refurbished and cleaned. Some old electrolytic/tantalum capacitors has been replaced and a busted IC-chip as well so now the machine is good as new again.
“This synth is in excellent condition, it really is a stunning machine, inside and out. Recently serviced this thing works and sounds like a dream. There is the tiniest scratch just underneath the ‘2’ button. (see photo) apart from that this thing is absolutely mint.”
“Inside the base plate is signed ‘Julia 12-16-81’, so I probably bought it (new) in early ’82. I’ve only used it at home and it’s been stored in the loft for some years.”
“Sequential Circuits Prophet 2000 Selling for Spares or Repairs not working no returns. Does not power up, as far as I am aware there is only the disk drive missing and the surface knobs. All CEM 3379s are present. In good cosmetic condition apart from the missing knobs. Will be packed well and sent fully insured.”
“This keyboard works almost like new! I discovered two keys that don’t work unless you press on them pretty hard. I suspect they need to be cleaned underneath. Some of the wood has also been damaged – otherwise, it is in great condition! ”
“So, I impulsively purchased a MiniMoog recently so I have to let this PRO1 go.
“Excellent condition, some keys not triggering which I am not gonna have time to sort out. Imagine a service will be about £100 .
“In good condition. Powers on; I don’t have a studio set up currently so can’t test further than that.”
“This keyboard works like new! Some of the wood has been damaged – otherwise, it is in great condition!”
“Here we have for sale a Sequential Circuits Pro One monophonic analog synthesizer. It has been fully dissasembled, the key contacts, busbar, switches and controls have been cleaned. The power supply has been recapped with nichicon high temp capacitors, and some mismatched hardware has been replaced. It is dated 1981 low serial number with true key contacts. All ins and outs have been tested and are deemed to be working. There are blemishes on some keys and the wood sides, but overall considering the age, it is in very good shape. It will be double boxed and packed securely.”
“The SCI / Sequential Circuits MAX is a 6 voice, multitimbral VCO polysyth with a built in Sequencer, MIDI in / out and 4 octave keyboard.
“The fine item you are considering is a Rare Vintage Sequential Circuits Multi-Trak Synthesizer Model 615 Keyboard No Power Supply. This cool vintage keyboard is being cold “as is” as I do not have a power supply and have no way to test it. My understanding is that these usually have an internal battery which will also need to be changed. The unit came out of long storage, and was quite dusty, but I cleaned it up pretty well, although the pitch bending wheel is still a bit grindy from dust. Cosmetically, the unit makes a nice overall impression, although one corner does show chipping/banging (see photos). Since I have no way to test this rather rare keyboard, I’m selling it “as is” at a low price that reflects that fact. Please see my photos to have a look at this nice item.”
“This unit is in great condition.
” here im selling the sequential circuits six-trak in very good condition almost without any mark on it
“The SCI / Sequential Circuits MAX is a 6 voice, multitimbral VCO polysyth with a built in Sequencer, MIDI in / out and 4 octave keyboard.
“This beautiful Prophet T8 has just been serviced by David Sesnak at Wine Country Sequential and is fully functional, running the latest OS version 3.8. I have cared well for it in my smoke-free studio for many years. Will ship in the same carefully padded box that Wine Country sent it in. Comes with original manual and dual foot pedal. Cosmetically in good condition – the wood is in good shape save for one noticeable scratch on the right wood cheek, and some scratches on the metal top cover (see photos).” 
“SPECIFICS
“Nice condition not mint but very good. J wire low serial with chassis mounted psu. I’ve owned it for several years and it’s been regularly serviced I had the power cord removed and a kettle lead put in its place much safer and easier to move around. I also had the keyboard bushings replaced about two years ago as the keyboard was shocking plays nicely now. The pro one badge came off in the studio and is unfortunately now lost but they are readily available on Facebook if you feel you need it. I’ve recorded with it gigged with it and it’s never once let me down. It can be a bit picky with power as in it likes an nice clean supply, if you have a pc or laptop running on the same circuit the analog oscillators will create hum, this is a common thing with a lot of vintage synths it also likes a good 10 or 15 mins to warm up. I will be really sorry to see it go but it’s just not getting the use these days and I’m a player not a collector. “
” here im selling the sequential circuits six-trak in very good condition almost without any mark on it
“Prophet 2000. Great condition(almost mint) , works perfectly and has had the disk drive replaced with a Lotharek (highly regarded) SD card reader (professionally installed by certified tech guy so it also looks great). Comes with SD card full of sounds from the sequential library and also has many other sounds from moogs, 808’s, solinas analogue synths etc.
“Used with scratches and scuffs. For parts/repair only. Powers on. Tones can be heard but there is heavy static.” 
“The fine item you are considering is a Rare Vintage Sequential Circuits Multi-Trak Synthesizer Model 615 Keyboard No Power Supply. This cool vintage keyboard is being cold “as is” as I do not have a power supply and have no way to test it. My understanding is that these usually have an internal battery which will also need to be changed. The unit came out of long storage, and was quite dusty, but I cleaned it up pretty well, although the pitch bending wheel is still a bit grindy from dust. Cosmetically, the unit makes a nice overall impression, although one corner does show chipping/banging (see photos). Since I have no way to test this rather rare keyboard, I’m selling it “as is” at a low price that reflects that fact. ” 
” Prophet 600. In great condition everything works. Had it serviced 1 year ago. Doesn’t get played enough.
“Sequential Circuits Pro One analogue synthesizer – restoration project
“Sequential Circuits Pro One Synthesizer – Serial No : 100-8249
“Up for sale the iconic and fat sounding Sequential circuits pro one mono synth. In ok cosmetic condition and fully functional. All the buttons, switches and keys works as they should. Some pots are a little scratchy such as the noise pot. This synth sounds big and it really cuts trhough the mix. I really enjoyed the sequencer and the modulation features as well as the cv and gate interaction via external sequencers. Is great for bass metalic sounds, guitar type sounds, drones and fx anything 80s with a darker tone. I’m really gonna miss this one.” 
“Very rare 80’s retro keyboard. I’ve personally owned this synth for over 8 years. Perfect working condition–pro-audio shop cleaning/inspection on 06/18/18. There’s some general external cosmetic wear from the years and the data slider has been replaced once. If you’re a just a gear head or do freelance work..this synth has a one of a kind sound perfect for taking any project to the next level.” 
“Somewhat rare vintage synth. Shoot me an offer! All parameters function on this. The lowest c doesn’t play and the lowest g plays but is quieter than the other keys. There is a slight gap between the edge and the body as seen in 9th pic. Pots can be scratchy and the sound can be scratchy at times, but I think it’s only when the flanger is fully applied. Would love to sell to someone who can open it up and work on the internal stuff. All in all good condition but needs light general maintenance.” 
“Sequential Circuits Prophet 600.
“This is a 1983 Sequential Circuits Six-Track six voice analogue synthesizer. It is one of the first analogue synths to include MIDI in and out and has 64 preset sounds. It has six voices that can be stacked individually as well as plays with six-voice polyphony. I am including the original manual. Because of it’s vintage nature it is being sold as is. Everything is tested and working.”
“This one is in really nice shape and is in great working condition. As you can see in the photos, this Vintage analog synth has been well looked after and has the regular wear and tear for a vintage synth of this age and pedigree.The unit has been fully tested, cleaned regularly and maintained well.All the keys, sliders, knobs, and switches are original and working as they should be.The front panel is clean with the usual marks & blemishes for a vintage synth of this age. Front panal has a very unnoticeable scratch (shown in photo)Back of unit has usual tour wear and tear as expected.The synth has been kept and stored in a climate controlled recording studio.Both beautiful side panels are brand new and without a blemish. (the originals are also included)This Prophet 600 is good looking and solid” 
“UK power supply. No mains power adaptor required. Fully working condition. Very heavy item!”