I'll offer you a bet. Each of us shuffles a deck of cards. Then we each simultaneously turn over our cards one at a time. Whenever the two cards match, you give me a dollar. If we get through the entire deck without any matches, I give you three dollars. We'll do this several times (consider an endless series of games.)
Would you take the bet? What's the break-even value of a non-matching deck to make it worthwhile?
You can test this with a single deck of cards by shuffling and dealing against a predefined order, such as Ace-King in each suit.
Source: Original.