Sears offers the Serta iSeries Vantage Plush Queen Mattress, model no. 400082-350, for $1,074. Coupon code "SEARS5OFF50" cuts it to $1,069. With free shipping, that's the lowest total price we could find by $120. It measures 69" x 80" x 13".
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.