So, in our modern world sooo much will blow this out of the water musically, but for those of us in 1990 with little money but wanted/needed a lot of composing and experimenting power (on a low budget) this "all in one" keyboard made many of us happy. :) (I'm using plural because indeed I made a friend later in life and he imparted that he, too, had bought a PSS-680 around a decade prior and loved it also!)
You can probably find hard specs online so I'll focus on what I deem are more important things in the context of selling it here...
- I bought new it at Good Guys on Shattuck in Berkeley in 1990 (or maybe '91) so I've been the only owner
- NOTHING is broken, cracked, etc. All keys and buttons are present and work. (Note: The "piano" keys on the PSS-680 are SMALLER THAN NORMAL SIZE)
- The cosmetics are all fine-to-great except for *slight* age-coloring of the keys (this keyboard is over a third of a century old now!)
- I wish CL had a "Very good!" condition option as I don't think this YAMAHA is quite "EXCELLENT!" but it's better than just "good," in that it could use a thorough cleaning, and one tiny rubber button has a small nick taken out of it
- Still has the original box, but it's a bit beat
- The FOAM (ENDS) for having it go into the box for transit *are still present/included*
- The manual got lost over the decades, but at least it's online
https://usa.yamaha.com/products/contents/keyboards/downloads/manuals/index.html?l=fr&c=keyboards&k=pss-680
- It didn't come with a power adapter, but I bought one (has always worked and still works perfectly) and I'm including it as part of the sale. (The primary way to operate it when ya first bought it was several C-size batteries.)
- As mentioned above, it could probably use an opening and cleaning by someone up to it
https://www.ebay.com/p/ show contact info
https://www.reddit.com/r/synthesizers/comments/95rgj0/the_other_unsung_portasound_hero_pss680_is_now/