Xixilailai via eBay offers this Rotating Smartphone / GPS Car Mount in Black or White for 99 cents with free shipping. That's tied with last week's mention and the lowest total price we could find for any such vent mount by $4. It features an expandable clip that attaches to most air vents.
LINDY offers this USB Wall Charger Kit 3-Pack in for $12.99. Plus, coupon code "DNFREESHIP" yields free shipping. (Be sure to select "UPS Ground Commercial" as your shipping method.) This 3-pack features three kits, each with a 1-amp 5-watt wall block USB charger and a 3.3-foot microUSB cable. Deal ends August 4.