Sequential Circuits Prophet-5 Rev3.3 w/Midi

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via this eBay listing

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"This one is in good cosmetic condition and working 100%. It has just been serviced and needs nothing. As the title says, this is an original Rev 3.3 with 120 programs and factory midi. There is no vintage button on this one! I got this from a gentleman who had it serviced by Wine Country before they went out of business. When I got it, there were still some problems so it has just been serviced again and it's solid now. This is marked as a domestic sale only, but I will ship out of the country. You can send me a message if you're considering to buy it and I will calculate the shipping cost then. Shipping overseas will not be cheap. Please keep this in mind."

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Yamaha CS-50 w/ Kenton MIDI SN 2546

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via this eBay listing, also on Reverb

"This Yamaha CS-50 is a classic analog polyphonic synth that delivers warm, expressive tones with rich modulation and filter control. Known as the little brother to the legendary CS-80, the CS-50 carries much of the same sonic character—lush VCOs, a powerful resonant filter, and a smooth, dynamic response that makes it ideal for pads, leads, and atmospheric textures. This particular unit has been upgraded with a Kenton MIDI kit, giving it modern playability while keeping the original sound path fully intact.

The Kenton MIDI retrofit gives you note on/off control, pitch bend, and sustain over MIDI, allowing you to control this analog beast from any modern DAW or MIDI controller. It still functions just as it always has from the front panel—no limitations there—but with the added flexibility to drop it right into a current production setup. The synth is in solid shape, with the original wood panels, keybed, sliders, and case showing honest wear but fully functional. All controls are smooth, all keys and sliders work as expected, and it’s ready to go.

This is a hard-to-find synth on its own, and even harder to find with a Kenton MIDI upgrade already installed and tested. If you’re after vintage analog character with real-world usability in today’s studio, this CS-50 offers a serious combination of tone, playability, and legacy value."

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Kurzweil 1000 Series Rackmount Digital Expander Sound Module SN 88113992

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via this Reverb listing

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"1000 PX Professional Expander (120 presets). Loaded with some of the best offerings from the same award-winning samples found in the K250 in a 24-note polyphonic multitimbral synth. Tested in great condition, includes AC power cable."

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Digital Keyboards Original Synergy Digital Additive Synthesizer - Progenitor Digital Synth SN 01166

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via this Reverb listing

"This is the holy grail of early digital additive synths: a true successor to Bell Labs' Alles Machine, built by Crumar and Digital Keyboards between 1982–85. With only ~700–800 units ever made and fewer than ~100 still running today this Synergy Mk. I stands as an ultra-rare, pro-grade instrument crafted for sonic innovators like Wendy Carlos who used it on the TRON soundtrack as well as her albums Digital Moonscapes and Beauty in the Beast.

This unit is fully functional and fully responsive. It harnesses a formidable engine of 32 digital oscillators capable of additive and phase-modulation tones, delivering 8 or 16 voice polyphony. You have 24 internal presets at your disposal, with cartridge expansion support. It’s standout feature is the ability to layer up to four distinct tones simultaneously, creating lush, shimmering textures or aggressive, harmonically rich leads. Sure, editing is minimal on-board, but that means its extremely user-friendly. Dial in a tone and go."

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MFB 503 2000s Drum Machine SN 11849

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via this Reverb listing

"Primitive 808 Style Drum Synth From MFB’s Early Days"

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Linn LinnDrum LM2 Legendary 🔥 Drum Machine (Serviced)

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via this Reverb listing

"This LinnDrum is fully functional and in great condition for its age. It has some wear on the panel but over all lookds good .

This unit has been serviced to ensure another lifetime of reliability. It features a brand new Power Supply from Synthronics.

Service notes include (06/18/2025)

Replacing outdated/corroding Power Supply with brand new Power Supply from Synthronics

New battery on new PSU

Replacing all old and aging electrolytic capacitors

Installing New Molex Connector on CPU Board

Disassembling all front panel buttons, cleaning internal contacts to to restore button functionality.

Disassembling all mixer sliders, cleaning, and lubricating sliders to ensure smooth, like-new feel and alleviate scratchy symptoms.

Cleaning and flushing all potentiometers to alleviate scratchy pot symptoms

Cleaning all input/output jacks.

Cleaning all socketed PROM contacts

Testing for a burn in period of several hours to ensure reliability"

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ARP Axxe Model 2313 Monophonic Analog Synthesizer SN 1803

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via this Reverb listing

"Step into the golden era of analog synthesis with this pre-owned 1975 ARP Axxe, a vintage monophonic synthesizer that delivers the unmistakable sound of the '70s. Introduced as a more accessible sibling to the legendary ARP Odyssey, the Axxe brought rich, punchy analog tones to players ranging from beginners to seasoned professionals. This early Mark I unit retains its distinctive black-and-gold aesthetic, robust metal chassis, and classic wooden side panels, all hallmarks of a time when craftsmanship and innovation defined electronic instrument design.

Renowned for its straightforward layout and characterful sonic palette, the ARP Axxe excels at producing gritty basslines, searing leads, and otherworldly effects. Its single-oscillator signal path, paired with a powerful resonant low-pass filter and classic ADSR envelope, allows for bold, expressive shaping with hands-on immediacy. Whether you're integrating it into a modular setup via CV/Gate or seeking that authentic vintage analog sound for your studio, the Axxe remains a sought-after gem with historical clout and musical relevance. Though this unit shows typical signs of vintage wear consistent with its age, it remains in solid playing condition and is ready for many more years of creative exploration."

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Roland V-Synth v2 w/ Extras SN ZQ50278

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via this eBay listing

"Comes with the manuals pictured, a 1G memory card with some loaded files, original drivers CD's (not pictured) and a very nice Gator molded hard travel flight case w/ wheels ($400.00 value). (Will be shipped wrapped in a shipping blanket inside the case.)"

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Oberheim TVS-Pro

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via this Reverb listing

Teenage Engineering OP-XY

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via this eBay listing

One giant USB stick, or one tiny OP-XY.

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BASTL Instruments MicroGranny 2.5 Monophonic Granular Sampler w/ Original Box

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via this Reverb listing

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Moog Werkstatt-Ø1 Analog Synthesizer Kit w/ Expander & Original Box SN 3039

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via this Reverb listing

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Moog Mavis Monophonic Analog Synthesizer Voice w/ Original Box & Materials

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via this Reverb listing

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Roland Sound Expansion Dance M-DC1 Rack Module Synthesizer

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via this Reverb listing

Additional SYNTH CITY Listings

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Yamaha CS01 Monophonic Synthesizer SN 9275 w/ Original Case

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via this Reverb listing

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Akai AX60 Analog Synthesizer

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via this eBay listing

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DK Synergy Digital Synthesizer Full Color 8 Page Fold-Out Brochure

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via this eBay listing

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Super Rare Kurzweil VA-1 For Sale

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via this Reverb listing

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Black Corporation Deckard's Dream Mk2 Polyphonic Analog Synthesizer Module SN 2363

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via this listing

Additional Perfect Circuit listings

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Studio Electronics Tonestar 8106

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via this Reverb listing

Additional CONTROL Listings

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