Buy & SellKing Size Mattress from CostcoKing Size Mattress from Costco$400Used for a year only, it's firm. Great for someone with back pain. ConditionLike newWHERE TO MEETCheck LocationView MapSELLERMelodyConcord342 reviews0 chats·1 favorites·14 viewsSEND CHAT TO SELLERHi Melody! I’m interested in your listing.Hi Melody! I’m interested in your listing.Get the Karrot app to chatSign In to chat