Vintage Ludwig Phase 2 synthesizer guitar

via this auction

"Ludwig Phase 2 synthesizer guitar multi-effects unit from around 1970."

YAMAHA SK-15 vintage analog polyphonic synth

via this auction
"The SK-15 is a multi-faceted polyphonic synthesizer. In addition to a basic analog poly synth, the SK incorporates a string section to rival other classic stringers of the 70's, and a flexible organ section that sounds more like a Hammond than any other organ/string synth of the time. What is more, one can combine all three sections for some powerful (and sometimes odd) sounds. This would be a great synth for live performance or a good workhorse for the studio."

YAMAHA ED10 ANALOG SYNTH DRUM PAD

via this auction

"there are 10knobs for control synthetic sound and touch sensitive drum pad SENS, PITCH, SUB SONIC, FILTER, NOISE, DECAY, BEND, CLICK, FILTER MOD, VOLUME
so you can tweak around these knobs and easily get warm and phat analog synth sound from deep bass drum like TR808 or TR909 to industrial noise percussion or spacey disco tom sound! it's very easy and funny to create your own sounds and play it with pad. it also has MIX INPUT,SIGNAL OUTPUT, PAD OUT/IN,DC 12V IN, DC 12V OUT PAD OUT/IN accepts trigger or audio signal so you can also control from your drum machine."