MATRIXSYNTH

Kawai SX-210

via this auction

"The filter on this synth is magical - same as the Korg Polysix. Great way to get that classic analog sound for less than you'd spend on some of the more popular synths like the Juno-60, Polysix, etc. 8-voice polyphony. Stackable DCO waveshapes with sub-oscillator. Portamento, Glissando, Mono and poly modes. Synth is in nice physical shape, fully functional except the end-caps have some chew on them. It's been serviced, battery replaced, key contacts cleaned and it works 100%. The only downside to this synth is the ensemble effect will overdrive (distort unpleasantly) pretty easily, which is common on the Junos as well (I have had 4 Juno-106s and 3 Juno-60s), but the Junos seem to have more headroom. I can't be sure if this is a factor of age or a design quirk, as I've never played another SX-210, but in practical use you have to back off the VCA volume if you get distortion as the VCA runs before the Ensemble effect."

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Endangered Audio Gristleizer version 1

via this auction

"For the first time ever, Throbbing Gristle's legendary effects unit, The Gristleizer, is now available in its classic tabletop form. Though the original design by Roy Gwinn is over 30 years old, The Gristleizer had never seen commercial production until the summer of 2009, when Endangered Audio updated and improved the circuit. The tabletop version is designed to sit within hand's-reach for easy parameter control, e.g. while playing synthesizers. In essense, The Gristleizer is a synth module that works with any audio signal. The audio path is modulated by an LFO using four selectable waveforms (ramp, reverse ramp, triangle, & square), functioning in one of two paths: VCA (voltage controlled amplifier) or VCF (voltage controlled filter). Ranging from light and sweet tremolo to extreme, raunchy ring mod, The Gristleizer is a 100% analog, hand-assembled unit built to last."

See this post on the history of the Grisleizer.