This petite whistle noisemaker was made in Germany sometime during the late 1920s. Its RSIN is "2," so you know these don't surface much. Sustainable guide value is $150, so the opening price is actually not unreasonable. The whistling mechanism on these is often broken, so I consider it a slight bonus that this is purported to be fully functional.
One negative with this seller is that the postage charge is $4.54. Given the item's small form factor and its negligible weight, postage shouldn't be more than $1.25, especially considering how tracking is now automatically included with First Class postage.
06/11 Update: The buyer got a solid bargain when scooping this up for the pittance of $74.95.