B&H Photo Video offers the Joby GripTight Auto Vent Clip Car Phone Holder for $11.95 with free shipping. (Amazon charges about the same.) That's $16 off and the lowest price we could find, although we saw it for $2 less in May. It features an airplane clip adapter, positioning ball, and TPS grip pads.

Update: Amazon now offers it for $10.93 with free shipping for Prime members.