Langria via Amazon offers its Langria Mesh Office Task Chair in Black for $99.99. Coupon code "9A374BGT" cuts that to $49.99. With free shipping, that's $110 off list and the lowest price we could find, although in December we saw it for $5 less. It features a 360-degree swivel and adjusts in height from 36" to 40".
Also available is the Langria 3D Adjustable Armrest Mesh Office Task Chair for $119.99 before the above coupon, $59.99 after. With free shipping, that's $140 under list price and the best deal we could find. It features the same specifications as the above chair, but adds adjustable armrests.