With orders of $25 or more, AbcoDirect via Amazon offers Prime members the Abco Tech Air Vent Smartphone Car Mount in Black/Red for $4.99 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping costs $6.22.) That's the lowest total price we could find by $9. It includes an adjustable clamp and 360° rotation.

Note that this item is offered as part of Amazon's "Add-on program" and can only be purchased with orders of $25 or more.