Resell It: to an Antiques Store
If you've got something you think is pretty unique -- and aged enough to be considered an antique -- then this might be the route you want to go. Whether it's your grandparents' hutch or some other oldie-pants item, an antiques store might be just the place to find a new (and more excited) owner for said piece.
Different antiques stores operate on different business models. Some might rent you a space for your stuff to attract customers' eyes, while others might purchase it outright on the assumption they have a knack for knowing what will sell. Some operate like consignment shops, simply housing your antiques until they sell, then charging you for their efforts.
Whichever the case, if that hideous -- yet expensive -- brooch you inherited from your nasty great-aunt Gertrude isn't your cup of tea and no one else in the family would touch it with a 10-foot pole either, consider an antiques store as a means of getting the clutter out of your life.