What makes something a family heirloom? When do you have the right to be mad that someone else sold or gave away something you might have liked?
My opinion- monetary or historical value does not make something a family heirloom. In order for it to make heirloom status, there needs to be emotional significance attached. Without the emotional component, it’s just stuff. Sure it may be cool stuff, or stuff worth money, but it’s still just stuff.
So before you get mad at a relative who has otherwise done right by you, consider if it is actually emotionally worth it.