This deal has ended.
Update: The price has gone up! Through 10/15, click here to activate an exclusive 5% off the Serta 8" Twin Size Memory Foam Mattress, which retails for $586.49, to drop the price from
$251.99 $256.99 to $239.99 $244.14 at Overstock. This is the lowest price ever for this well reviewed mattress. It comes complete with a smooth jacquard eco-friendly cover. Better yet, shipping is currently free and there's no sales tax (except UT).