Woot offers 360° Rotating Magnetic Car Mount Phone Holder for $2.99 (reg. $10.99) free shipping with Prime. 

Product Description:
Strong Magnetic suction bracket，Anti-seismic Explosion-proof, Applicable to most mobile phone models. Multiple in-car positions can be selected for assembly. Powerful Magnetic Attraction Small and Exquisite Design Extreme Stickiness Easy & Quick Installation One-Handed Operation Excellent Compatibility More Usage Scenarios

• Neodymium magnet has been used and the powerful magnetic force can make sure your device be fixed tightly without affecting the signal of the device. Low center of gravity design makes the device more stable, let you enjoy the fun of driving.
• Universal compatibility magnetic phone holder for iPhone and Android phones.
• 360 Degree rotation, double-ball axis, tilt angle adjustment space more that 2 times. 4 magnets to form an internal closed magnetic field, does not affect the mobile phone signal
• Car Mount using high-strength metal materials manufactured, explosion-proof, sun protection, do not hurt the car , do not leave traces, safe driving.
• Suitable for a variety of traffic conditions, such as emergency braking, speed bumps, rugged mountain roads, etc.
• Car Mount using higt-strength metal materials manufactured, exlosion-proot, sun protection, do not hurt the car , do not leave traces, safe driving.