Idealpoint via Amazon offers Prime members the Arcadia Arclight 2.0 Bluetooth Keyboard Case for iPad Air, model no. NT510K, for $28.95. Coupon code "ARCLCASE" cuts the price to $18.95. With free shipping, that's $41 off list price and the lowest total price we could find. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $9.) It features Bluetooth and a matte finish and is adjustable for horizontal and vertical orientations.