Ending today, REI Outlet offers its REI Traverse 30 Pack in Black for the in-cart price of $51.73 with free shipping. That's $48 off list and tied with our August mention as the lowest total price we've seen. It features a water bottle pocket, TipGrip loops, and spring steel perimeter frame that transfers weight to a padded hipbelt.
It's not guaranteed for delivery by Christmas with standard shipping or pickup. However, orders placed today (December 17) with Two-Day Shipping for $20.99 should arrive by Christmas.