eBags via eBay offers the SwissGear Travel Gear 18.5" Scansmart Laptop Backpack in Black or Gray, model no. 5903, for $44.99 with free shipping. That's $5 under our April mention and the lowest total price we could find by $20. It features a padded laptop compartment, zippered mesh pocket, organizer pocket, shoulder strap, airflow back system, and water bottle pockets.