Korg MS-20 analogue synthesizer

via this auction

Korg MS 50 (Analog Modular Synthesizer)

via this auction

Roland System 100M Modular Synth

via this auction

"There is some wear as you would expect of synths from 1979, but considering their age, they are in superb condition. These are both identical units made up of 112, 121, 130, 140 & 150 modules along with the 191-J casing."

Yamaha CS80

via this auction

"It works perfectly, with one exception, which is that the light illuminating I string 1 does not turn on. The voice works fine, it's just the little bulb inside the switch that is not in service."

Life before LEDs

Roland VB-99 Bass Synthesizer system

via this auction

I don't think I ever realized this had a ribbon controller until now.

SCI Prophet 5 (rev. 3.2) Vintage Analog Synth

via this auction

"Sequential Circuits Prophet 5 rev. 3.2 w/ midi (120 programs)"

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NOT NAMM: RibbonBasicDemo.mov

YouTube via sheepslinky
"The finalized EW ribbon: CV, Expression Pedal, Gate, Trigger. Heaviest duty construction. Demo played with standard solid state VCO, ADSR, VCA. Ray Wilson's MFOS (http://www.musicfromouterspace.com) modules were used in this demo to show the universal compatibility with other analog synthesizers.

This model will be available soon from Electric Western. http://www.electricwestern.com/"

NAMM: Korg Kaossilator Pro at Winter NAMM 2010

New video added to the bottom of this post.

SCI Prophet-600 Analog Synthesizer

YouTube via retrosound72

"vintage synth demo by RetroSound

Sequential Circuits Prophet 600 Analog Synthesizer (1982), the first synth with Midi;
the demo shows the different sound settings (VCO, VCF, Sync, Filter-FM) and some self-made retro sounds

For me one of the most underrated analog synths ever. The sound is fantastic, a bit different to the big brother Prophet-5."

Sequential Circuits Prophet VS Digital Synthesizer with Analog FIlters

YouTube via selectimputor
"Sequential Circuits Prophet VS Synthesizer. Demo of some features including Mod Wheel, Bend, LFO, FIlter, Unison Mode, Arpeggiator, and changing the waveforms. I am not by any means an expert of this synth."