Unless it is catalogued - it is virtualy useless.Few have the desire to dig through dead people's disorganized crap.
Miles and miles of catalogued boxes - are waiting beneath Smithsonian for someone to even care to view...#441A5567 box letters Buckeye CO 1932 -1934 Ackerman.
Volunteering at a library - 2/3 of the donations go in the dumpster....too old, too worn, water stain, mildew, unknown, markings....TONS - dumpsters so full the disposal company can't lift them.
Aviation, best sellers, War, text books are all keepers....music? who care or plays?