Docks are hard to come by for Android hardware, where very few individual models rise above the pack. But if you're one of 30,000,000 people sporting a Galaxy S III, or one of the considerably smaller number using AT&T's Samsung Infuse 4G, you can pick up an official vehicle mount for a song. Assuming that you can sing a song that's worth five American dollars.
The Infuse 4G dock is currently $29.99 on Amazon, but some wary forum poster over at SlickDeals spotted the same dock at AT&T's online store for just five bucks even. This particular model has been a favorite on XDA for a while, where user "ookba" (who had upgraded from an Infuse 4G to a Galaxy S III) noted that the larger phone fit in the dock just fine, thanks to the gently rounded corners.