TechMatte via Amazon offers the TechMatte MagGrip Air Vent Universal Car Mount Smartphone Holder in Black, model no. 2851730, for $6.99. Coupon code "MHE52LAQ" cuts the price to $3.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping adds $6.01.) That's the lowest total price we could find by $5. It's compatible with most devices and mounts to any vehicle's vent.