Altatac via eBay offers the Every Day Carry Tactical Assault MOLLE Loop Backpack in six colors (Tan pictured) for $30.99 with free shipping. That's the lowest total price we could find by $4. (We've seen slightly smaller similar backpacks for as low as $20.) It measures 17" x 9" x 11" and features an expandable main compartment, middle compartment with zippered interior pouches, and removable padded shoulder straps and waist belt.