Sears offers the Sunbeam Twin Heated Mattress Pad
for shipping. That's $3 over yesterday's expired mention but the lowest total price we could find now by $33. Sales tax is added where applicable. It features a 140 thread count, fits mattresses up to 18" deep, is machine washable, and more.
Of note, the pad is also available in Full and California King for $29.97 and $39.97 respectively, also current price lows.