Yamaha V50 Synthesizer 61-Key Keyboard

Vintage YAMAHA SY55 Music Synthesizer Keyboard Piano Synth SY-55 (Fully Working)

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Casio CZ-5000 Digital Keyboard Synthesizer 61 Keys Display MIDI In Out Line Out

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KORG Poly-800 Analog Synthesizer Keyboard 49-Key Vintage Japan Tested