Sears offers the Serta Cobee Firm Queen Mattress, model no. 701481-350, for $129. Coupon code "SEARS5OFF50" cuts it to $124. With $69.99 for shipping, that's $26 below our mention from last month, $251 off, and the lowest total price we've seen. It features Fireblocker fiber, Serta Pillowsoft foam, and 420 SertaFlex Innerspring.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.