Question on sony walkman E374 and E364

[ybnormal]

Hi,
I'm considering to buy 'new'(claimed by the sellers) Sony NWZ-E374 or E364 on ebay and looked for product reviews on google, but I wasn't able to find any reviews by the third parties like cnet, consumerreport, or such. This made me wonder.... Were they available in the US ?

I'm concerned about this because I'm not sure how warranty works if the product wasn't originally available in the US.

And I believe they are the successor of E354.. What is different between E354 and E364/E374 ??

I'd appreciate your thoughts and advices..

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