MATRIXSYNTH

Octave The Cat Vintage Analog Synthesizer

via this auction

"It was a bit tough to get a clear picture of the serial number on the back but it reads M3881."

Sold For: US $1,136.11
via selectivepressure in the comments

Excelsior Digisyzer Digital Synth Accordion

via this auction

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Sequential Circuits Prophet VS Synthesizer

via this auction. Note this is the one from this video.

Custom Korg Polysix

via this auction
"Every button, switch, knob, keys, input and output works on this keyboard. I have replaced the original battery about 1 year ago with a rechargeable battery pack as seen in the pictures and also cleaned all the key contacts at the same time. I have the original Polysix cassette, instruction manual and programming manual as well. The lit purple strip you see is EL tape that I added - I think it looks pretty cool but you can easily remove it if you want to."

Sold For: CAN$600.00
via selectivepressure in the comments

Wersi WB24b synth/ drum machine

via this auction

Sold For: US $105.00
via selectivepressure in the comments

MAM MAP-1 MIDI Arpeggiator

via this auction

"Less options than a cyclone, but easier to use and more compact. 119 x 106 x 37 mm Requires a 9V AC power supply."

Sold For: AU $435.00
via selectivepressure in the comments

Moog Minimoog Model D

via this auction

Studio Electronics MidiMini

via this auction
"This has the MiniMoog Oscillator board, the Filter/VCA board and the Analog board! It is a full MiniMoog in a compact rack mounted unit with full Midi!! This particular unit was down to the fella's at Studio Electronics/Analogia about a year ago for a full tune up, latest OS installed and a 3-prong power cord added. SOUNDS AMAZING!!! The modification adds full Midi with velocity, aftertouch, pitch and modwheel setting, Oscillator sync, an LFO(so you don't have to use a Osc. 3 as an LFO), multi-trigger, sweepable second oscillator, note priority settings(last, low, high) and much, much more!!!"