Walmart.com has this 32" Expandable Rolling Duffel Bag for $14, the lowest price we could find on any such bag by $14. It has a perfect 5-star rating from 22 reviews so far, mostly citing a great value for the price. It is made of 600 denier polyester for long-term durability, and the wheels and shoulder strap make it easy to switch between carrying and dragging it. In-store pickup is free; otherwise shipping adds $3.97. Sales tax is charged in most states.