Amazon currently has the Sennheiser PXC 550 Wireless Headphones on sale for just $299. That is good for $100 off of the regular retail price. Making these a great buy at this point, seeing as they have never dropped below $300 before.
The Sennhesier PXC 550 wireless headphones are a pair of Bluetooth headphones, which makes them great for using with many of the newer smartphones coming out these days, since the majority of them are removing the headphone jack. It also has NoiseGard adaptive noise cancellation, which means you can really zone out into your music or whatever you are listening too. Sennheiser has the controls on the ear cups of the PXC 550's, and there is also NFC for easy pairing. Of course, when it comes to sound quality, Sennheiser has everything you need here. With its own signature sound quality and selective sound modes.
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.