Excellent noise-cancelling headphones considering they can be found for a good deal if you search hard enough. While sound quality and performance sans-battery isn't up to Sennheiser PXC 450 level, most people will find these are a worthy and decent performing purchase
While their sound and design may not appeal to everyone, the Panasonic RP-HTX7s are excellent entry-level over-the-ear headphones that are a good bargain.
Panasonic takes to CES 2013 to announce a pair of headphones that use your cheekbones to transmit audio, freeing your ears to hear the outside world.
Panasonic's affordable wireless headphones feel comfortable and sound great.
Panasonic's very affordable RP-HJE355 series in-ear headphones sound as good as many earphones that cost twice as much.
For under $10, you'll be hard-pressed to find in-ear headphones that sound better and are more comfortable than the Panasonic ErgoFit RP-HJE120s.
As far as really inexpensive headphones go, you're not going to do too much better than the Panasonic RP-HT21s.
While the ErgoFit RP-TCM125 doesn't sound as good as the cheaper RP-HJE120, it still sounds respectable for its budget price tag and includes a one-button inline/remote microphone.