I think the issue is that you can’t expect family to have the same knowledge of valuables as you do nor do they have the time to research and bring in appraisers. Often they are racing the clock to get a clean out done. So if you have things worth money either sell them or tell your heirs specifically what those items are. Personally, I am selling my things unless I know it is something my son would keep.No,they don't consider it at all - penny wise and dollar foolish my friend- it is indeed such a pity!
They are so anxious to be "rid" of everything so they can either sell the unit or rent it out- looking for what they can profit and who knows ? They may have discarded something equal to a months rent!