Staples Acadia Ergonomic Mesh Mid-Back Task Chair (Black) for $79.99. Make it even better by getting a $25 off $75 coupon here or here. Be sure to pick one with instant e-mail delivery. After the coupon, the total comes to $54.99 shipped plus coupon cost. This chair features height-adjustable padded arms, built-in lumbar support, adjustable seat height and tilt lock.