Rather or not it`s worth it is up to you. However, it wouldn`t do to just have the crank turned, you would also have to have the rod the bearing spun on resized and the piston on that rod replaced. Most often when we say "rod knock" it`s not really the rod you hear, it`s the piston slapping the head.
I told a friend of mine this and he didn`t believe me, so he reused the same piston, he wished he would have listened when that piston came apart, bent the rod and the wrist pin wore a groove into the cylinder wall into the water jacket. Also since the trash from the spun bearing will be circulated throughout the engine, you may as well tear the whole thing down, so really, you`d just be starting over. And since you don`t know the wear on the cylinders, the block may need bored, adding more cash to the pile.