BuyDig via eBay offers the HiFiMan HE400i Planar Magnetic Headphones in Dark Blue Chrome for $149.99 with free shipping. That's $25 under our mention from three weeks ago and the best price we've ever seen. (It's a low today by $50.) These open-back headphones feature single-ended planar magnetic drivers, 20Hz to 35kHz frequency response, and 35-ohm impedance.