REI offers the Timbuk2 Track ll 15" Notebook Backpack in Night Blue/Violet/Purple for $18.83 plus $5.99 for shipping. (In-store pickup via ship-to-store is also available, as is free shipping on orders of $50 or more.) That's the lowest total price we could find for this backpack in any color by $27 and the least expensive Timbuk2 laptop backpack we've seen. Sales tax is added where applicable. It accommodates most 15" laptops and features a padded laptop sleeve, secondary zippered compartment with organizer panel, padded back panel, water bottle pocket, and more.