VMInnovations offers the High Sierra Tech 2 Series Titan 55-Liter Frame Pack in Brick, model no. 62421-4417, for $116.95. Coupon code "BDCAMP616" cuts it to $89.99. With free shipping, that's the lowest total price we could find by $22. Features include a top-load main compartment with movable inner lid, outer and inner zippered pockets, bungee cord for extra gear, and three mesh pockets.
Of note, it's also available in Black, model no. 62421-4415, for the same price via coupon code "BDCAMP626".