I need help in knowing how I can best dispose of a very large collection of books, many Diana items I

have collected for 25 years. I am 80 years old and
my children have no interest in Diana books (have
over 275 books, plates, dolls , pictures etc) and I
need to start moving things out of my home. I wanted to open a Diana museum but looks like
it will not occur. Any help in best directing this question will be greatly appreciated.

thank you,
Barbara