I've seen a couple of 80s running around in their ground mounts in Northrend, so I'm making this thread to spread the news. In K3 (a place in the Storm Peaks), there's a goblin that gives players FREE flying mounts. Check the following video:

This goblin is near the flight master. The item he gives you can be used in only three zones (Sholazar Basin, Icecrown, and the Storm Peaks), and you can use it as soon as you hit lvl 77.