BuyInCoins via eBay offers this Universal Desktop / Windshield Cell Phone or GPS Mount
(pictured) for $3.59
with free shipping
. (Eforcity via Amazon
has a similar mount for pennies more.) That's a buck under our July mention and the lowest total price we could find by $2. It features a suction attachment, 360-degree movement, and width span of 4.5".
Note that this item ships from Hong Kong and may take up to 25 days to arrive.