This rattler is indeed rare as the seller states. It was produced in Germany during the early 1930s. By that time, the Germans were producing far fewer exported novelty items in smaller and smaller quantities as their political leaders' attentions drifted toward war. Although I've seen this tin litho noisemaker a handful of times, I've not seen it in this nice of condition. This is truly an item for which it will be worth ponying up some bucks. As of this writing it would sell for $60 with over four days remaining. I expect it to go much higher.
08/28 Update: $675.99 - WOW!