A teacher of mine recently purchased a newer digital piano, and is willing to sell me his old Clavinova CLP-311, and I was wondering how much one would expect a used one for, if anyone could provide me some info. He's asking around $800, and in fairness, it was recently fully repaired and made essentially brand new. But still, i know that it's an old model so I'd like some feedback. Anything to help would be great!