Yallstore via eBay offers the Free Knight 60-Liter Outdoor Travel Rucksack in several colors (Black pictured) for $20.49 with free shipping. That's a buck under our mention from three weeks ago and the lowest price we could find for such a backpack by $10. It features side mesh pockets, waist pack design, thickened shoulder and waist straps, and splatterproof coating.

A close price: Groupon has it for $15.94 plus $5.95 for shipping.