Cyber Monday price slash, Similar price on dicksmith ebay back in May but 20 cents cheaper, seems to have good reviews, no need for magnetic plate compare to the logitech vent mount.
BELKIN Mobile Phone Clip-on Air Vent Mount allows you to mount your smartphone to your car air vent, keeping your phone safely accessible and in plain sight. It leaves your windscreen uncluttered and keeps phones out of direct sunlight by having it mounted below the dash. It even takes advantage of the car's air conditioning to keep the phone at safe operating temperature during summer.
Features:
Fits most car vents
Connect your phone with one hand
Adjusts up to 8.5cm (Phablet friendly)
360f3o Rotation
Perfect for smartphone GPS apps
Convenient built-in cable holder
Case compatible
I recently purchased a similar one from ebay, <$10 delivered from HK, quite a good device, big phones take some playing to stop them bouncing around and working out of the vent.