Yamaha Anolog Synth CS-20M

via this auction

ENSONIQ ESQ-1 SYNTHESIZER

via this auction

"8-voice DCO digital synthesizer with analog resonant filter, MIDI, 40 internal patch save locations, and sequencer to boot. Per voice you get 3 oscillators 3-LFO's, 4 VCA's and 4 envelopes! Additional patch storage is available with optional cartridges"

Roland Jupiter-6

via this auction
"Roland Jupiter 6 Analog Poly Synth!

Serial number 535034, Later Model with Midi Thru on Board.

Also when in dual mode transmits and receives on channel 1 and 2!

Not updated with Europa however a worthy model considering it's later MIDI board verses older Jupiter 6's which did not have MIDI thru or simultaneous channel 1 and 2 mode."

x0xb0x synthesizer Roland TB 303 Clone w mods

via this auction

"mods:
Bass Boost - adds a little to the low frequencies
Resonance boost - increases the highest resonance to make it really scream
Distortion mod - adds some nice distortion to the output
All these modifications have bypass switches"