Tom Top USA via eBay offers the Lixada 55L Tactical MOLLE Military Backpack in Camouflage 6 for $18.48 plus $3.99 for shipping. (Three other colors are available for slightly more.) Excluding other eBay vendors, that's the lowest total price we could find for any color now by $5, although we saw it for a buck less in our expired mention from three days ago. It's made of water-resistant 600D oxford fabric and features detachable MOLLE front and side pouches, adjustable padded shoulder straps, and waist and chest straps.