Walmart offers the Ematic Wireless Headphones and Transmitter, model no. EH156, for $8.90. Choose free Site-to-Store pickup to dodge the $4.97 shipping charge. That's $11 off list price and the lowest price we could find. This set is compatible with PCs and MP3 players and features a wireless transmitter with a range of 90 feet, FM radio, and a built-in microphone.