Sears offers the Northwest Territory Twin Size Air Bed, model no. 11729, for $9.89. Opt for in-store pickup to avoid the $8.99 shipping charge. That's the lowest price we could find by $15, although we saw it for $5 less in June (after factoring in a $5 SYWR credit). It features 32 inner-coils, a fabric sleeping surface, and inflated dimensions of 74" x 39" x 9".
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.