Take 40% off all mattresses with code FURN38 at JCPenney.com. This can take hundreds of dollars off your total; for example, this Sealy Posturepedic Crystal Bay Plush King-Sized Mattress drops from $1400 to $840 after the code! This is around $50 under the price we saw for similar ones. May of the mattresses (like this Sealy Posturepedic one) ship for free and others charge an extra delivery fee. Warranties are also included. Sales tax is charged in most states.