Harbor Freight is currently offering this 1-1/2 hp gas-powered auger drill for $180. It features a 7/8″ drive shaft that spins at 150 rpm, and it ships with a 30-3/4″ auger bit. And like any small engine-powered tool, its a polluter — so you can’t order it from California.
But it sure looks like it’d beat the crap out of a post hole digger. Damn, I hate post hole diggers.
1-1/2 HP Gasoline Auger Drill [Harbor Freight]