Saw a Craigslist post for a Yamaha 52" UX from early 1980's - $3700. It's not in my area but deliver was quoted for $700 which was reasonable.http://chicago.craigslist.org/nwc/msg/3782534443.html
I had a good tech ( http://www.mrpianotuner.com/
) check it out and he says:
The piano is in great shape. The dampers are just starting to get a little "spring squeek," but it's not noticeable when you play. It's caused by the individual damper springs making tiny clicks that, together, create the illusion of a squeek. You can really only hear it with the top open and actually listening for it. You'd never notice it if I hadn't pointed it out. It typically costs about $75 to $100 to fix. It's just a matter of removing the dampers and rubbing a pencil lead in the grove and putting them back on - about an hour and a half work.
Other than that, it's in really great shape. I did a quick tune over the whole thing. Although it hasn't been tuned in about two years, the tuning was still really good - not unusual for this kind of piano. The owner said you were thinking of driving down to try it out. It's up to you, but I don't think there is anything in particular to be concerned about unless you're looking for a particular tone or something. Considering the money you are spending, and that you will likely have this piano for many years, it might still be worth the drive and a night's hotel just to make sure you're totally happy with it.
Sounds good? I'm about to Paypal over the money so I'd just like a last confirmation from you all here. It's a 5 hour drive one way to check it out -- but I'm planning on only keeping this piano for 4 years since I'll be moving - so it doesn't need to be perfect.