I recently received a pair of Sony MDR-ex300's off ebay today and i'm very disappointed by their sound quality. They sound very muddy, not like they're even bass heavy, even when listening to .flac files. They sound like the 99 cent ear buds you get at dollar general. I was wondering, the auction kept making reference to the seller being a "hong kong seller", are the earbuds i received knock-offs? I did only pay $9 for them shipped compared to their $50 msrp, but i've seen a lot of things on ebay a lot cheaper than msrp. Please give your incite because i'm relatively new to ebay and i'm not sure if what i'm thinking is legit.