eXpansys still offers the Airbak Professional 15" Notebook Backpack, model no. PR318, for $23.99 with free shipping. That's tied with our mention from a week ago and the lowest total price we could find by $5. It features an internal padded 15" laptop compartment, Airbac air bladder for protection between the backpack and your back, multiple interior pockets, MP3 player pocket, and more.