Sorry about your loss. My "Second Battle of Manassas" cup didn't survive the last move, and my USAir (from before the name change) mugs have been through the dishwasher so often that they only say "US" now.
My family has lost a lot of family heirlooms-nothing outrageously expensive, but a lot of stuff that retained sentimental value-during our frequent peregrinations throughout the borough.
I think we may have even had an original Salvador Dali lithograph, though I'm not sure if it was worth anything.