amazon.com has the Osprey Farpoint 40 Men’s Travel Backpack on for $99.99 with free shipping.

• Large, lockable U-zip duffel-style access to main compartment – 40L total volume
• Meets carry-on size restrictions for most airlines (Size Medium/Large: 21H X 14W X 9D inches)
• Lockable zipper access to padded laptop & tablet sleeve (fits up to most 15″ laptops)