IBD Electronics via Amazon offers Prime members the Okra Universal Magnetic Vent Car Mount for $10.99. Coupon code "GJ3SF59W" cuts it to $7. With free shipping, that's the lowest total price we could find by $6. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.01.) This device features three magnetic plates to mount your smartphone to a car vent.