ELEKTRONIKA EM-26

via this auction

"Electronika EM-26 portable vocoder is intended for synthesis the voice or external signals, has internal strings ton-generator, analyzer-synthesizer, modulations and vocoder effects. Control panel include 4 sections: VIBRATO, VOCODER, STRINGS and LEVEL, also it has a panel real time transpose and other controls.

VIBRATO section has sliders - accent, depth and rate
VOCODER - chorus knobs (on, mode), mic/vocoder level
STRINGS - on/off, level, violin/cello, sustain
LEVEL - mic, line A, line C
Keyboard PANEL: main level, pitch, interval, octave, pitch bend

CONNECTION (1/4 jack): mic in, line A,C, phones, output, pedal, power."

Sold For: US $399 via selectivepressure in the comments.