Samsonite via eBay offers this High Sierra Modi 17" Laptop Backpack in Static/Mercury/Pool, Mercury/Charcoal/Lime, or Lime/Charcoal/Black for $25 with free shipping. That's the lowest total price we could find by $15. It features adjustable straps, zippered pockets, and will hold a 17" laptop. It measures 20" x 13" x 8".