Kelty TC 2.0 Transit Child Carrier for $71.99 shipped.  It features sliding waistbelt torso-length adjustment, one layer, curved waistbelt, padded backpanel, waistbelt storage pockets, padded adjustable-height childs seat, 40-pound weight limit, lightweight internal aluminum frame, mesh water-bottle pockets, organizer pocket, carrylift handles, and more.  Most places have it for about $81.