Agreed, I was at least expecting in the 700's
But then again that was unfortunately probably not part of the goal.
Now that it sold for ~150K, buyers remorse... then again a lot of people just buy this for the look and not the power.
With that being said I don't think it sounded that great at all, a little lack luster. With the look and the name I would have expected an engine, even if it didn't have the power to have the bark, snap / pop of a bad attitude.
If you go to ~0:58 it doesn't even sound like its tuned well, so hopefully for the new owner there is more in it.