Sam's Club again offers its members the Herman Miller Aeron Chair in Black, model no. AE113AWB, for $499 with free shipping. (Non-members pay an additional $49.90, so it's best to buy a 1-year membership for $45.) That's tied with our mention from June and the lowest total price we could find by $105. It features adjustable arms, tilt, height, and lumbar support; 2.5" casters; and a graphite base. It's available in size medium which is appropriate for those who are 5'3" to 6'6" and weigh 140 to 300 pounds.