The vast majority of it is not actually valuable in any way. Have you ever tried to liquidate the estate of a deceased boomer generation relative? North America is awash in consumer goods. Nobody wants 10, 15, 20 year old used household furniture and items. Very little of it actually has any value. It's a burden, not an asset.

Unless you are lucky enough to have an uncle who left an Apple Lisa in its original box on a shelf in his garage...