The Ginsu knife is a product most famous for the activities that were used to promote it. It was made famous through a series of long-form advertisements in the 1970s and it is claimed paved the way for the modern day infomercial with its use of quirky catchphrases, comical quips, and urgent call to action, including the phrase "how much would you pay...don't answer" and "but wait, there's more". ~via Wikipedia

The target audience understands that very well.