Used and some newly upholstered couches are sold here, and delivery and pickup services are offered. Furniture Traders
Selling a used mattress can be challenging because of strict health and safety regulations. While many retailers sell new or floor-model mattresses at a discount, finding a business that buys used mattresses directly from individuals is rare. Most buyers prefer peer-to-peer marketplaces or local consignment shops that specialize in furniture. Local Options for Used Mattresses and Furniture
Since most major retailers won't buy back a mattress once it has been slept on, your best bet is often selling directly to another person.