BackCountryOutlet.com takes up to 30% off select North Face backpacks during its current sale. Plus, use coupon code "37A-1-G0XND" to take an extra 50% off outlet items. That's one of the best discounts we've seen for this brand, however, it's taken from the original price, not the sale price (most are already marked down by up to 30% off).

Shipping starts at $8.15, or get it free on orders of $50 or more. Some notable items, all after discount:

http://www.backcountryoutlet.com/outlet/subcat/8/b88/The-North-Face-Backpacks.html

I think the code only maxes your discount to 50% off, not an additional 50%. If the item is 40% off, it makes it 45%.