Sam's Club offers its members the Herman Miller Aeron Chair in Black, model no. AE113AWB, for $449 with free shipping. (Non-members pay an additional $44.90, so it's best to buy a 1-year membership for $45 if you plan to shop here again in the future.) That's the lowest total price we could find by $80. It features adjustable arms, lumbar support, 2.5" caster, and a graphite base. Deal ends May 14.