-Elektron Analog Keys - ¥75,000.
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With box, gently used, the screen still has the protective film.
Selling it only 'cause I got the A4 Mk2.
-If you are looking for the A4 Mk2, I would consider an offer, ¥115,000; comes without the box though.
Unfortunately I cannot keep both: the Mk2 is more practical to carry but the A-Keys is a future classic. Regarding the sound, you can achieve anything you want, but you'd have to take a deep diving:
Trades for modular gear also welcome.
Could be delivered at any station of JR Yamanote Line.