This Earphone

Buy.com has the Coby Electronics CV-890 Wireless Headphone for $32 with free shipping. It has 50mm high power neodymium drivers, padded earpieces, built-in recharging Circuit for Ni-Cad Batteries are included.

Product description from Buy.com:

Listen to your music in perfect clarify with these high-quality headphones. And no need to worry about untangling cords — these headphones are wireless and hassle-free.

Features:

• Full-Closed Type!
  Professional Series
• 2.4 GHz Wireless Technology
• High Performance 50mm Neodymium Drivers for Deep Bass Response
• Large Cushioned Comfortable Ear Pads for Maximum Comfort
• Built-in Recharging Circuit for Ni-Cad Batteries (included)

FeaturesManufacturer Coby Electronics CorporationWireless Technology RFEarpiece Design Over-the-headEarpiece Type BinauralManufacturer Part Number CV-890Standard Warranty 1 YearForm Factor Ear-cupManufacturer Website Address www.cobyusa.comProduct Model CV-890Product Name CV-890 Wireless HeadphoneProduct Type Headphone

Product link.

Staples.com has the Coby Noise Reduction Headphones for $15, with free shipping on $50. single-sided cord with gold plated 3.5mm stereo plug.
Product link.

Staples.com has the Coby Noise Reduction Headphones for $15, with free shipping on $50. single-sided cord with gold plated 3.5mm stereo plug.
Product link.

Buy.com has the Coby CV870 2 Wireless Headphones with FM Transmitter for $41 with free shipping. Includes 2 Wireless Headphones, FM Transmitter, 2 carrying cases and 4 AAA batteries.
Product link.