ROLAND SH-101 Vintage Synthesizer (GRAY)

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Dave Smith Instruments TETRA

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"4 fully analog synth voices (4 mophos in 1 box - half a prophet 08 with 2 sub oscs per voice and audio feedback) stackable or multi timbral with 4 independent sequencers."

Sold For: US $645.00
via selectivepressure in the comments

Roland PG-200

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"Roland PG-200 programmer for the JX-3P, MKS-30 & GR700 guitar synth."

Sold For: US $406.00
via selectivepressure in the comments

Casio DM-100 rare double keyboard

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Yamaha SHS-200

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You can find the user's manual here.