Best Buy offers the Targus Crave II 16" Laptop Backpack in Midnight Blue, model no. TSB78802US, for $29.99. Choose in-store pickup to avoid the $3.99 shipping charge. That's the lowest total price we could find by $23. It features a laptop compartment, two zippered side pockets, mesh rear panel, and Dupont Teflon fabric protector.
Still want it shipped? Best Buy via eBay only charges $2.99 for shipping.