I bought this trick on accident. When I recieved my package, i was about to throw this card away thinking it was a typo but kept it anyways.

What i do is i ask a spectator to pick a card and then tell them that this is a prediction trick. I then say that my card is double the value of their card but the same suit. They are very skeptic and when I show them the card i have, the freak.

It is very inexpensive and you should buy it.