EBay, Pianomart, or craigslist.If it's a private sale, bring along an independent (certified) technician, unless you really know how to assess it yourself (hint: playing is just a small part). Make sure you hire a *piano* mover and not a general mover.Last summer, I paid $3K for an immaculate Kawai KG-2C on EBay; it's probably worth three times as much. I'm getting a humidifier installed in a few months, but still pinch myself in disbelief.
there is some question in my mind as to why you might want to...