I bought mine brand new and still have it even though I sold all the other Technics keyboards and I had them all.
I kept this one because it is so rugged, plays well, has very little value, can still play a gig, I have a lot of great Americana software it will play and on and on. I take it on trips in the motorhome because I know the bumps and drops never seem to hurt it. Everything still works after all this time.
I value it at about 200.00 as I once in awhile see one for sale in the music store consignment centers.
Bebop