REI-Outlet offers its REI Stoke 9 Backpack in Amber/Magnesium for $29.73. Add it to your cart and it drops to $21.73. With $5.99 for shipping, that's tied with our mention from two months ago for the lowest total price we've seen. It features perforated foam shoulder straps, a hydration straw, hip belt, and a foam back panel.