Hi ruizcia,
I would say follow you opinion (about them being a scam). Yes, it's true there are no negative posts about them on ripoffreport.com or on the net but it could be because this site is barely a month old.
It was created just last 27-Oct-10, Link hidden: Login to view They are based in China and yet everything if not almost everything they offer is a branded electronics product - Apple, Dell, Blackberry and Sony to name a few. There is no way we can guarantee that their products are indeed authentic.
Also, they only accept payments through Western Union and wire transfers, both of which are considered as unsafe and a very easy way of loosing your online.
Personally I would stay away from them and I would suggest you do the same.
Hope this helps :)