BuyDig via eBay offers the Audio-Technica ATH-M50x Professional Studio Monitor Headphones in Black or White bundled with the FiiO A3 Headphone Amplifier for $129.99 with free shipping. That's $10 below our February mention and $40 under the best price we could find for these items purchased separately elsewhere. The headphones feature a 15Hz to 28kHz frequency response, 45mm neodymium drivers, and three detachable cables. The amplifier is designed to improve sound in headphones rated between 16 to 150 ohms.