It is forbidden for Jews, male or female, to get married to non-Jews. And this means that Orthodox Jews do not date non-Jews since Orthodox Jews only date for the purpose of marriage. The idea of casual relationships with members of the opposite sex is not an Orthodox, Jewish one, and is not condoned in the community.
Nope, many of them, especially in the electronics category are scammers. A simple rule of thumb on Alibaba: If the seller demands payment by Western Union or Moneygram and refuses Alipay, paypal or a form of payment with a dispute resolution method to recover money if non-delivery, do not buy from them.