The piano is very cool with a great history!
As others said, there may be better venues to sell it.
First thoughts are NextDoor, Craigs List or Facebook Marketplace. Those bring more local buyers that would save you the trouble of shipping. And there probably are music centric sites as well.
Oh, and don't sell your other items before the piano, you may need them!
Sending America's collectibles where they belong, one auction at a time!