iOrange-E via Amazon offers its Prime members the iOrange-E Universal Hook Air Vent Metal Car-Mount Cell Phone Holder in Black for $11.99. Coupon code "H8YPOXIX" cuts it to $7.99. With free shipping, that's $13 off list and the lowest total price we could find. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.14.) It fits devices from 2" to 3.4" in width and features 360° rotation.