We are a family of second hand roses. We have a house of second hand furniture, most of it beautiful 19th century furniture, some we have bought, some we have inherited, some we have restored. We have no hesitation about disposing of things we no longer need by putting them in an auction sale or selling it on ebay.
We are currently having an extension built and sent to auction a set of late 19th century kitchen chairs, a davenport, a dresser and a small desk that were no longer needed. In their place we bought at auction, a 1950s Ercol dining room suite for the new kitchen/family room - and about broke even, making as much from selling as we paid for the Ercol.
AC have both inherited the same tendency. DD is into Arts and Crafts and Mid-century modern and inherited a magnificent Arts and Crafts bedoom suite from one grandmother, Ds and DDiL have taken furniture from family homes after grandparents have died.
Providing you treat your furnishings like your clothes, recycling,sending to Charity shops, auctions, selling on ebay or Freegling/Freecycling rather than throwing away and looking to similar souces for their replacement. so that you stay within a green cycle of change without destruction, why not change everything.