iFi Audio Bluetooth DAC / Headphone Amplifier I purchased this about two years ago, but I'm selling it because I've only used it about 10 times in my setup. It's practically unused, and I've stored it carefully, so the condition is almost like new. As a bonus, I'm including a Pentagon ear adapter. You can get a better deal than the used price of 44,300 yen (Grade A) at e-earphone!!