Korg Polysix

via this auction

If you ever consider picking up a Polysix, read this and pay attention to the leaky battery bits.

Sold For: US $315.00

via selectivepressure in the comments

MEMORYMOOG analog poly synth

via this auction

Sold For: US $3,327.00

via selectivepressure in the comments

Snare+ Drum Voice PCB - Thomas Henry

via this auction

Korg Oasys Open Architecture Synthesizer

via this auction

Sold For: US $3,995.00

via selectivepressure in the comments

Casio FZ-10M

via this auction

"Casio FZ-10M 'Professional Digital Sampling Synthesizer'

1. This is a synthesizer with sampling capabilities. It can be programmed subtractively, or additively using harmonic waveforms - similar to Kawai's 'K' series, very interesting results can be achieved. You can also 'draw' your own waveforms (totally unique even by today's standards) or take snap shots of sampled waveforms to use as oscillators. Yep.
2. It has a nasty digital filter with resonance that is capable of turning sounds inside out. It's got character:)
3. It has 8 stage looping envelopes - any modern synth designers taking note?
4. XLR in and out, SCSI port built in, eight individual outs, and a built in disc drive (one blank disk is included) standard"

Sold For: US $163.50

via selectivepressure in the comments