SEARCHING VALUE OF A ARION PIANO FORTE SQUARE GRAND PIANO PATENT NOV.13,1866 AND JUNE 23, 1868 IS IT RARE $$$?

IF SOMEONE COULD TELL ME WHERE I COULD GET AN EST. VALUE AND IS IT RARE I CANT FIND IT ANYWHERE THE COMPANY INFO FROM BACK IN THE DAY BUT THERE SEEMS TO BE NONE AROUND ANYMORE THANKS IF YOU CAN HELP