Sears offers the Serta Coralee Full Mattress
, model no. 500555581-1030, for $149.99. Coupon code "SEARS5OFF50" drops it to $144.99
. With $69.99
for shipping, that's $293 off list and the lowest total price we could find. It features layers of foam and fiber over a 420 SertaFlex Innerspring offset coil design.