If I Sell My Piano, How Much Can I get For It?

To an individual you can get this much
and to a dealer you

can get this lower amount.
Trading it to a dealer on another purchase can get you this higher amount.
To a non profit you can get this amount - much lower but usually you can get a tax write off for the balance.  For example if the pianos value is $5000 you might get a check for $1000 from a non profit and a tax write off for 4000