Aww hun, I'm pretty sure this one is a scam. I've seen the wording like this before. Someone rehoming one Yorkie, maybe, but two, a boy and a girl. Nah, it's a scam. They are probably fishing for email addresses. In that case, you won't hear anything back from them. You'll just get an email telling you there is 1 million dollars waiting for you in a bank in Nigeria.
If they are scamming and do make contact, they will say they are far away and please send money to pay for the puppy to be shipped. Keep us updated.