after carting it around for over 10 years without using it much, mom is selling her piano music. she's got lots of it because she taught piano lessons way back before i was a twinkle in anyone's eye. when she was teaching, she had 30-35 students per week, and they ranged in age from 5 through about 60. it was great fun, and a good way to put herself through graduate school.
there's another part though...of course. many years ago (even before the way back!), mom hurt her wrist. she can't play much...maybe 10 minutes at a time. it's not going to get better than it is right now (5 surgeries and 11 years later)...until there's an opportunity for a wrist joint replacement.
so it's time to let go. the piano's going too. it's ok.
mom's philosophy about sorting and choosing things to let go: if it is replaceable, it can be let go. if it is unique, you can choose to keep it. not much of this is unique.
maybe mom will get enough to join the gym so that she can keep swimming! that seems like a worthwhile reason to sell stuff.