SONYREWARDS has this

Sony Rewards Price $ 46.00
Cardmember Price $ 43.00
Available 9/7/2009 - 9/13/2009

Lowest Price I found in internet is $57 new.

Model: MDRNC22/BLK

Noise canceling earbud headphone
Active noise canceling technology reduces up to 87.4 percent of ambient noise1
Built-in monitor function lets you silence the audio playback so you can listen to the surrounding environment.
Lightweight (1.38 oz, including battery) earbud-style design sits comfortably in the ear.
Enjoy up to 50 hours of noise canceling functionality from a single alkaline battery (size AAA) battery2.
Includes 1.5m cord, in-flight plug adapter3, and carrying pouch.
Up to 87.4% ambient noise reduction1
Listen with or without noise cancellation
Monitor switch lets you mute audio to listen outside
Earbud-style design sits comfortably in the ear
Lightweight (1.38 oz, including battery)
13.5mm driver units for wider frequency response
Neodymium magnets deliver superior sound
Up to 50 hours battery life2
Includes carrying pouch and in-flight plug adapter3

your title makes it look like negative $, take out the "-"

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