for Sennheiser & Audio Technica product, pls buy at reputable store or person to ensure genuine stuff, i dont mind paying a bit extra to have peace in mind.

I had seen lots of fake CX95, CX300, CX400 & CX500 iem around.
for ath, fake ES7, ESW9 & etc also are quite common.
although all fake iems/cans may sound very nice at 1st audition, u will sure belief it is real. but the fact is u dont know the real sound signature that so u cant differentiate.
just my 0.02cents only..