Woot (Amazon Company) has Cards Against Humanity Sale with $5 shipping.

The last time Cards Against Humanity was on sale, the game sold out within 6 hours and resellers were selling the game for two to four times the amount for a while.

This game has two expansion packs for $3.99 there.

Cards Against Humanity: First Expansion $10 at amazon.

Cards Against Humanity: Second Expansion $10 at amazon.

About Cards Against Humanity:

The Manufacturer recommended age is: 17 years and up

Cards Against Humanity is distributed under a Creative Commons BY-NC-SA 2.0 license.
That means you can use and remix the game for free,
but you can't sell it without Cards Against Humanity's permission.

The card game template is also free to download from Cards Against Humanity's website.

Cards Against Humanity was a Kickstarter project and the game is like Apples to Apples for adults.

Reviews:

Cards Against Humanity has obtained an average 4.9 out of 5 star rating from customers on Amazon.

Drawbacks:

This game is not for anyone who takes situations seriously all the time.

The game is definitely not for children.
We suggest to follow the manufacturer's age recommendation.