Not quite half but hell for the chance to go invisible I'll put up the difference. 

It works! I responded to the ad and it rendered my money TOTALLY INVISIBLE! My payment is nowhere to be seen!
I wonder how the 'Moral Purposes Only' thing works. How would they enforce that? I mean, even Kevin Bacon went voyeur after becoming invisible in that crappy movie.
I'm gonna wait until it's $19.95 S&H ... I'm sure it'll be an infomercial in the not so distant future.
BillWill
Weird as it gets...