Safergo-Direct via Amazon offers the Safergo Never Fall Off Tiger Teeth Heavy Duty Car Air Vent Phone Holder for $15.99. Coupon code "OTGZBCSE" cuts the price to $9.91. Plus, Prime members bag free shipping. That's the lowest price we could find by around $10. It holds heavy devices from 3.5" up to 6" and allows for 360-degree free rotation.