BuyDig cuts 57% to 66% off a selection of laptop backpacks. (The discount is reflected on the product's page.) With free shipping, that puts each at the lowest total price we could find by at least $4 and as much as $34. The deals:

• Wenger Swissgear UPLOAD 16" Laptop Backpack for $24
• Wenger SwissGear 15.6" Granite Laptop Backpack for $33
• Wenger SwissGear 16" Digitize Deluxe Computer Backpack with Tablet/eReader Pocke for $37.99