This deal has ended.
eBags.com offers this The North Face Mainframe Backpack, normally $99, for $79.99. With free shipping, this is the lowest total price we could find by $16 in one color, and by $20 or more in the other colors. This backpack comes in 5 colors and it features padded and vented shoulder straps, a large main compartment, several other pockets, and a laptop compartment. There is no sales tax (except CO, TN & CA).