I'm going to buy this sennheiser cx 400 ii from ebay http://www.ebay.com/itm/CX-400-II-BLACK-Precision-In-Ear-Earphones-Headset-Headphones-/252749965220?hash=item3ad91267a4:g:cFgAAOSwEjFXcS2D
it's only 22 $ (+6$ for shipping) and it's coming from a top rated seller.
i'm not sure about it's...