I melted down and got a pair for 16€ (insured and tracked). Hope they do better than ZS3 which had lot of quality problems (sound tube). I bought 4 pairs of ZS3 for 4$ per pair for modding purposes. IMHO... the best way to get custom IEM currently is to get ZS3 or ZS4 shells, open them and install some good BA`s or DDs or both and Your`e done ;P Though this need testing unit and measurements and etc. ...but perf vs. cost vs. comfort is damn high!