http://www.newsweek.com/elon-musk-cyberwhistle-ebay-sold-out-hundreds-dollars-apple-polishing-cloth-1655438 > Elon Musk has launched yet another marketing stunt by releasing a Tesla whistle that is in such high demand that it is selling for several times its original price on eBay. Musk announced the "Cyberwhistle" in a tweet on Tuesday night. The stainless steel whistle resembles the shape of Tesla's Cybertruck electric vehicle, hence the name. > Described by Tesla as a "premium collectible," the whistle was available on its website for $50 before quickly running out of stock. Tesla says the product is final sale, so it will not be listed again. Musk plugged the whistle on Twitter in what appears to have been a reference to whistleblowers.