Amazon currently has the Sony DualShock 4 Wireless Controller for the PlayStation 4 available for just $36. It's normally priced around $59.99, so this is a great price on an extra controller, and also brings it down to an all-time low.
The DualShock 4 is the wireless controller that ships with the PlayStation 4. It's a great controller that can be charged via micro USB, and last quite a while when playing. It's available in a slew of different colors, but only the Jet Black one is available for $36, the others are closer to the original price of $59.99. This is a great time to pick up an extra controller if you are looking to play with other people, or just want to have a spare controller for when one battery dies, so you don't need to stop playing whatever game you are currently playing.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap next-day shipping if you need it here extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime by hitting the link below. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year. Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.