Kurzweil PC2R Digital Rack Sound Module synthesizer with PSU - works!

Korg TR-Rack Sound Expander Access Module Synthesizer Silver

Kurzweil PC2R Digital Rack Sound Module V4.0 & AC adapter

Yamaha TF 1 / TF-1 FM synthesizer rack module for TX816 and TX216 (1)

Korg Wavestation SR Rackmount Vector Synthesizer Midi Module, used sparingly, EC

Vintage Yamaha BC1 Breath Controller for Synthesizer Keyboard Audio Equipment

Roland M-VS1 Vintage Synth M-OC1 Orchestra M-SE1 String Expansion Bundle MIDI

Kawai K5M Rackmount Digital Synthesizer Module - works!